Rusqlite example

example of metadata; btrfs to zfs; klaus x ben; used pontoon boats for sale by owner near me; lakota horse trailer parts catalog; motorcycle accident waterbury ct; las vegas weather 30 day forecast accuweather; van dyke road widening project; hadamard gate bloch sphere; path of war pathfinder pdf; love birds name; www pkmovies cf bollywood ... accountability examples in life Jul 14, 2022 · Rusqlite Rusqlite is an ergonomic wrapper for using SQLite from Rust. Historically, the API was based on the one from rust-postgres. However, the two have diverged in many ways, and no compatibility between the two is intended. Usage In your Cargo.toml: Diesel offers a high level query builder and lets you think about your problems in Rust, not SQL. Our focus on zero-cost abstractions allows Diesel to run your query and load your data even faster than C. minecraft poppy playtime grab pack mod Other Example VFSes. The following are other VFS implementations available in the public SQLite source tree: appendvfs.c - This VFS allows an SQLite database to be appended to the end of some other file. This can be … cool 5 letter words for gamertags There's a few interesting things to note in this example: SQLite is an embedded program, and it doesn't have a database username or password — it's just a file. Very quick and easy to use for embedded programs like this, but if anyone gets ahold of your file they can read it.Rusqlite . adep: debhelper (>= 12) helper programs for debian/rules adep: dh-cargo (>= 25) debhelper buildsystem for Rust crates using Cargo adep: cargo Rust package manager adep:. restaurant depot flyer may 2022. cars for sale on craigslist. marine online shop. is it illegal to lie on a resume about education ... a nurse in an acute mental health facility is planning care for a client who has anorexia nervosa2022/05/30 ... cargo new rusqlite-example % cd rusqlite-example [dependencies] rusqlite = "*". main.rsにsqliteへアクセスするためのコードを書いていきます。Serialize/deserialize rusqlite rows | Rust/Cargo package. ... serde_rusqlite ... Deserialize, Debug, PartialEq)] struct Example { id: i64, name: String, } ...Here's a small-ish test program based on the rusqlite example code: North carolina furniture manufacturers listSQLite is an in-process library that implements a self-contained, … polski dermatolog chicago Sep 23, 2019 · In the above example, we open a scope with {} around the database transaction, this will automatically close the db when it goes out of scope. Notice that we create our db connection and do all our work with the database solely inside the {}. Rusqlite json. yamaha finance payment ... 1918 bar handguard feel like i failed comlex level 2 reddit career criminals examples the henri floor plans gypsy wagon ... libsqlite3-sys is a separate crate from rusqlite that provides the Rust declarations for SQLite's C API. By default, libsqlite3-sys attempts to find a SQLite library that already exists on your system using pkg-config, or a Vcpkg installation for MSVC ABI builds. You can adjust this behavior in a number of ways:Implementing a Job queue with SQLx and Postgres An example of async postgres in rust rust tmq sqlx 2020-06-26. SQLx is a new async SQL Toolkit for rust that is closer to standard SQL than a more opinionated ORM like Diesel.I wanted to give it a bit of a test run and see how easy it would be to convert usage from tokio-postgres.So as the next ... Rusqlite async. Mar 13, 2022 · Well that's not completely exact. If using an async function, the compiler will generate a self-referential struct for you. I use this together with genawaiter to implement a cache for "view types" that are both costly to produce but unfortunately tied to a another resource (the drawbacks of "zero-copy parsingCargoでプロジェクト作成後、Cargo.tomlでライブラリの指定をします。. % cargo new rusqlite-example % cd rusqlite-example. [dependencies] rusqlite = "*". main.rsにsqliteへアクセスするためのコードを書いていきます。. まずはuseと構造体の定義。. さきほどcreate tableしたpersonテーブル ...Example. ///. /// ```rust,no_run. /// # use rusqlite::{Result, Connection, params};. ///. /// struct Person {. /// name: String,. /// age_in_years: u8,.2022/07/14 ... Finished dev [unoptimized + debuginfo] target(s) in 1.19s Running `target/debug/rust-spatialite-example` [1] 33253 bus error cargo run -- ... recent sports scandals 2022 Example: When we create a sqlite database. Similarly, we can create this database in python using the SQlite3 module. Python3 import sqlite3 file = "Sqlite3.db" try: conn = sqlite3.connect (file) print("Database Sqlite3.db formed.") except: print("Database Sqlite3.db not formed.") Output: Database Sqlite3.db formed. Connect Database:SQLite Data Types — Data Types in SQLite with Examples. 👉 Lesson 6. SQLite Query — Select, Where, LIMIT, OFFSET, Count, Group By. 👉 Lesson 7. SQLite Join — Natural Left Outer, Inner, Cross with Table Examples. 👉 Lesson 8. SQLite INSERT, UPDATE, DELETE Query — Learn with Example. 👉 Lesson 9.The rusqlite crate uses bindgen to create the wrapper, which can result in long compile time. rusqlite is a safe wrapper around the SQLite wrapper. It also supports hooks such as commit, insert, etc. rusqlite does not include async support. Over 200k developers use LogRocket to create better digital experiences Learn more → 6. leveldbRust + rusqlite + chrono example. Contribute to notakaos/rust_sqlite3_example development by creating an account on GitHub. twrp mtp SwaggerUI generation example for Golang Oct 02, 2022 Small golang server to push PgSQL listen/notify events into websockets Oct 02, 2022 Examples of Golang compared to Node.js for learning Oct 02, 2022 A toolbox of non-trivial Contentful interactions Oct 02, 2022 A beginner friendly repository made specifically for open source beginners Oct 02 ...Like rusqlite , it may increase compile time since it uses bindgen. Also like rusqlite , there is no async support. 7. mongodb. MongoDB is a NoSQL database. Rust has an official. stolas x blitzo lemon Jun 23, 2022 · Follow the following steps to install and uninstall SQLite 3 in linux ubuntu 22.04: Step 1 - Update System Dependencies. Step 2 - Install SQLite 3. Step 3 - Verify SQLite 3 Installation. Step 4 - Uninstall SQLite 3 From Ubuntu.. conair infiniti pro spin air brush. mississippi craigslist boats stainless steel catering pans votes Serialize/deserialize rusqlite rows | Rust/Cargo package. ... serde_rusqlite ... Deserialize, Debug, PartialEq)] struct Example { id: i64, name: String, } ...Connection::transaction prevents this at compile time by taking &mut self, but Connection::unchecked_transaction () may be used to defer the checking until runtime. See Connection::transaction and Transaction::new_unchecked (which can be used if the default transaction behavior is undesirable). Example. kitchen island outlet height Sep 06, 2018 · feature request: make possible to use chrono without Local enhancement. #1222 opened on Aug 23 by Dushistov. 4. rusqlite: without modern_sqlite, some tests fail. #1216 opened on Aug 16 by dkg. 2. Feature request: libsqlite-sys built-in sqlite math functions. #1211 opened on Aug 9 by evbo. 6. Sep 06, 2018 · feature request: make possible to use chrono without Local enhancement. #1222 opened on Aug 23 by Dushistov. 4. rusqlite: without modern_sqlite, some tests fail. #1216 opened on Aug 16 by dkg. 2. Feature request: libsqlite-sys built-in sqlite math functions. #1211 opened on Aug 9 by evbo. 6. 2021/01/23 ... You will still need to provide the postgres / mysql / rusqlite driver as a feature ... Example. use rusqlite::Connection; mod embedded { use ... hatfield 410 automatic shotgun walmart Rusqlite json. yamaha finance payment ... 1918 bar handguard feel like i failed comlex level 2 reddit career criminals examples the henri floor plans gypsy wagon ... Rusqlite is an ergonomic wrapper for using SQLite from Rust. Historically, the API was based on the one from rust-postgres . However, the two have diverged ...Here's a small-ish test program based on the rusqlite example code: North carolina furniture manufacturers listSQLite is an in-process library that implements a self-contained, …business for sale leicester zoopla ffxiv dungeons with npcs. 16dpo spotting when wipe x forscan battery replacement. nickelodeon stars that went crazy 1966 ford galaxie 500 convertible value The sqlite3 module was written by Gerhard Häring. It provides an SQL interface compliant with the DB-API 2.0 specification described by PEP 249, and requires SQLite 3.7.15 or newer. Tutorial teaches how to use the sqlite3 module. Reference describes the classes and functions this module defines.See full list on openbase.com how to get windows server 2012 r2 product key using cmd Several examples are available, including a full game based on Space Invaders, Conway's Game of Life, and a custom shader. This release adds support for wgpu 0.10 (better late than never). Which is a huge improvement. The only breaking changes are reexports and an error variant name change. In most cases, this upgrade is a drop-in replacement. Aug 04, 2021 · Second, because the tradeoffs of complex systems are often misunderstood, and most of the time, they bring more problems than benefits. And these problems compound over time. So here is a little experiment to show you how to reach 15,000 inserts per second with simple technology, which is approximately 1.3 billion inserts per day. 1.3 Billion. SQLite Data Types — Data Types in SQLite with Examples. 👉 Lesson 6. SQLite Query — Select, Where, LIMIT, OFFSET, Count, Group By. 👉 Lesson 7. SQLite Join — Natural Left Outer, Inner, Cross with Table Examples. 👉 Lesson 8. SQLite INSERT, UPDATE, DELETE Query — Learn with Example. 👉 Lesson 9. ron and hermione fanfiction poisoned Following is an example to fetch and display all these records using SELECT statement. Here, the first three commands have been used to set a properly formatted output. sqlite>.header on sqlite>.mode column sqlite> SELECT * FROM COMPANY; Finally, you will get the following result.Jul 14, 2022 · Rusqlite Rusqlite is an ergonomic wrapper for using SQLite from Rust. Historically, the API was based on the one from rust-postgres. However, the two have diverged in many ways, and no compatibility between the two is intended. Usage In your Cargo.toml: Sep 05, 2022 · Serde Rusqlite. This crate provides convenience functions to bridge serde and rusqlite. With their help you can "deserialize" rusqlite Row 's into serde Deserialize types and "serialize" types implementing Serialize into bound query arguments (positional or named) that rusqlite expects. Serialization of named bound arguments is only supported ... See full list on github.com oculus quest 2 navisworks Rusqlite is an ergonomic wrapper for using SQLite from Rust. It attempts to expose an interface similar to rust-postgres. use rusqlite::{params, Connection, ...Rusqlite is an ergonomic wrapper for using SQLite from Rust. Historically, the API was based on the one from rust-postgres. However, the two have diverged in many ways, and no compatibility between the two is intended. Here's a small-ish test program based on the rusqlite example code: North carolina furniture manufacturers listSQLite is an in-process library that implements a self-contained, …The rusqlite prepared statement cache is close enough. Links. LibSQL is a new SQLite fork. Whereas SQLite famously does not accept outside contributions, LibSQL is approaching it from a more community-based open source viewpoint. They're aiming toward some more "modern" features such as support of io_uring and perhaps WASM user-defined ... typescript arrow function 2021/08/04 ... Of course, by bundling all the inserts in a single transaction, for example, or by using another, non-async database driver, but it does not ...Rusqlite Rusqlite is an ergonomic wrapper for using SQLite from Rust. Historically, the API was based on the one from rust-postgres. However, the two have diverged in many ways, and no compatibility between the two is intended. Usage In your Cargo.toml: find warzone teammates Sep 05, 2022 · Serde Rusqlite. This crate provides convenience functions to bridge serde and rusqlite. With their help you can "deserialize" rusqlite Row 's into serde Deserialize types and "serialize" types implementing Serialize into bound query arguments (positional or named) that rusqlite expects. Serialization of named bound arguments is only supported ... Rusqlite Migration is a simple and performant schema migration library for rusqlite. Performance : Fast database opening: to keep track of the current migration state, most tools create one or more tables in the database. These tables require parsing by SQLite and are queried with SQL statements. This library uses the user_version value instead. station square sunday brunch An UPSERT is an ordinary INSERT statement that is followed by one or more ON CONFLICT clauses, as shown in the syntax diagram above. The syntax in between the "ON CONFLICT" and "DO" keywords is called the "conflict target". The conflict target specifies a uniqueness constraint that will trigger the upsert. The conflict target may be omitted on ...rusqlite example indoor amusement park new hampshire. caravan for sale near me; Confirm My Choices. miraculous ladybug fanfiction marinette revenge. libsqlite3-sys is a separate crate from rusqlite that provides the Rust declarations for SQLite 's C API. By default, libsqlite3-sys attempts to find a SQLite library that already exists on your.When I directly copy the example usage from the readme I get compilation errors due to the Params bound. I am using Windows 10, rustc 1.59.0, rusqlite 0.27.0 with the &quot;bundled&quot; feature er...rusqlite example indoor amusement park new hampshire. caravan for sale near me; Confirm My Choices. miraculous ladybug fanfiction marinette revenge. libsqlite3-sys is a separate crate from rusqlite that provides the Rust declarations for SQLite 's C API. By default, libsqlite3-sys attempts to find a SQLite library that already exists on your. firehouse for sale tennessee Create or redefine SQL functions. Example. Adding a regexp function to a connection in which compiled regular expressions are cached in a HashMap.For an alternative implementation that uses SQLite’s Function Auxiliary Data interface to avoid recompiling regular expressions, see the unit tests for this module.. "/>.2020/07/22 ... こちらのサンプルを改造してみました。 Crate rusqlite ... use rusqlite::{params, Connection, Result}; #[derive(Debug)] struct City { id: ...Jul 14, 2022 · Rusqlite Rusqlite is an ergonomic wrapper for using SQLite from Rust. Historically, the API was based on the one from rust-postgres. However, the two have diverged in many ways, and no compatibility between the two is intended. Usage In your Cargo.toml: fiberglass resin walmart [dependencies] serde_rusqlite = "0.30.1" Serde Rusqlite This crate provides convenience functions to bridge serde and rusqlite. With their help you can "deserialize" rusqlite Row 's into serde Deserialize types and "serialize" types implementing Serialize into bound query arguments (positional or named) that rusqlite expects. Connection::transaction prevents this at compile time by taking &mut self, but Connection::unchecked_transaction () may be used to defer the checking until runtime. See Connection::transaction and Transaction::new_unchecked (which can be used if the default transaction behavior is undesirable). Example. wow first aid trainer The T on your Result<T> is coming from the table scheme, so T's type will be already determined by the database, not by Rust.. Usually a good practice is to create a struct that maps your SQL table like in the example on the documentation.. 2019. 4. 15. · Contribute to dskkato/rusqlite_sample development by creating an account on GitHub.set for life results dividends. heavy duty door mats inside ingenico moby 5500 user manual Jun 23, 2022 · Follow the following steps to install and uninstall SQLite 3 in linux ubuntu 22.04: Step 1 - Update System Dependencies. Step 2 - Install SQLite 3. Step 3 - Verify SQLite 3 Installation. Step 4 - Uninstall SQLite 3 From Ubuntu.. conair infiniti pro spin air brush. mississippi craigslist boats stainless steel catering pans votes Several examples are available, including a full game based on Space Invaders, Conway's Game of Life, and a custom shader. This release adds support for wgpu 0.10 (better late than never). Which is a huge improvement.Aug 04, 2021 · In this example, we use a Stream with tokio which seem way better at handling concurrency than SQLite's locking mechanism. The machine For the record, the server is a Scaleway ENT1-S, so not the slowest VPS of the market, but not that expensive either. $ sudo lscpu The rusqlite crate uses bindgen to create the wrapper, which can result in long compile time. rusqlite is a safe wrapper around the SQLite wrapper. It also supports hooks such as commit, insert, etc. rusqlite does not include async support. Over 200k developers use LogRocket to create better digital experiences Learn more → 6. leveldb what happens if you never get served court papersRusqlite json. yamaha finance payment ... 1918 bar handguard feel like i failed comlex level 2 reddit career criminals examples the henri floor plans gypsy wagon ... Rusqlite example. lavender farm new england msi mpg b550 gaming plus compatible cpu. summer internships for high school students 2022 near Armenia is memory loss from ... northwood iowa amish greenhouse SwaggerUI generation example for Golang Oct 02, 2022 Small golang server to push PgSQL listen/notify events into websockets Oct 02, 2022 Examples of Golang compared to Node.js for learning Oct 02, 2022 A toolbox of non-trivial Contentful interactions Oct 02, 2022 A beginner friendly repository made specifically for open source beginners Oct 02 ...Play TextTwist ® 2 for a brand new dose of word F-U-N! Keep the text twisting when you play the original Super Text Twist ®. Instructions: Form words from the letters provided. Find the BINGO WORD - a word that uses all the letters - to move to the next round. Find all of the words for bonus points! See in-game help for detailed instructions.In the above example, we open a scope with {} around the database transaction, this will automatically close the db when it goes out of scope. Notice that we create our db connection and do all our work with the database solely inside the {}. vintage goldwing parts I see online blogs talking about referencing sqlite3.dll,Mono.Data.Sqlite.dll,System.Data.dll,for example Setup Database (SQLite) for Unity or using some of the third-party import methods unity-3rdparty-sqlite-net or importing via third-party package management tools Unity3D 入门:如何管理 Unity 项目中的 NuGet 包?SQLite Home PageRust sqlx sqlite. 7x64 vs 7mm rem mag. Diesel offers a high level query builder and lets you think about your problems in Rust, not SQL.Our focus on zero-cost abstractions allows Diesel to run your query and load your data even faster than C. Productive and Extensible Unlike Active Record and other ORMs, Diesel is designed to be abstracted. fleck 9000 head I see online blogs talking about referencing sqlite3.dll,Mono.Data.Sqlite.dll,System.Data.dll,for example Setup Database (SQLite) for Unity or using some of the third-party import methods unity-3rdparty-sqlite-net or importing via third-party package management tools Unity3D 入门:如何管理 Unity 项目中的 NuGet 包?Sep 06, 2018 · feature request: make possible to use chrono without Local enhancement. #1222 opened on Aug 23 by Dushistov. 4. rusqlite: without modern_sqlite, some tests fail. #1216 opened on Aug 16 by dkg. 2. Feature request: libsqlite-sys built-in sqlite math functions. #1211 opened on Aug 9 by evbo. 6. Connection::transaction prevents this at compile time by taking &mut self, but Connection::unchecked_transaction () may be used to defer the checking until runtime. See Connection::transaction and Transaction::new_unchecked (which can be used if the default transaction behavior is undesirable). Example. flycast vs redream libsqlite3-sys is a separate crate from rusqlite that provides the Rust declarations for SQLite's C API. By default, libsqlite3-sys attempts to find a SQLite library that already exists on your system using pkg-config, or a Vcpkg installation for MSVC ABI builds. You can adjust this behavior in a number of ways:If that were true, it would indeed make it easier to integrate my libressl-src package into the build of openssl and rusqlite. They wouldn't need any (even optional) dependency on it, … minecraft nbt schematic In the above example, we use the .table command to list all tables from SQLite database. In this example, we already created three different tables such as emp, students, and company. The end result of the above statement is shown below screenshot. As a reference, you can likewise give an argument to this command.Rust is a great language for building low-level tools with powerful static analysis, and SQLite is a great database that can be fully embedded within a small application. The two seem made for each other! So let’s begin a new project and attach the rusqlite crate. Here’s a small-ish test program based on the rusqlite example code:Several examples are available, including a full game based on Space Invaders, Conway's Game of Life, and a custom shader. This release adds support for wgpu 0.10 (better late than never). Which is a huge improvement. The only breaking changes are reexports and an error variant name change. In most cases, this upgrade is a drop-in replacement. father39s day car shows near me Rusqlite examples Sep 03, 2021 · SQLite is an in-process library that implements a self-contained, serverless, zero-configuration, transactional SQL database engine. It is free and you don’t need to buy any license to use it. A persistent cross-site scripting (XSS) issue in the web interface of SuiteCRM before 7.10.35, and 7.11.x and 7.12.x before 7.12.2, allows a remote attacker to introduce arbitrary JavaScript via attachments upload, a different vulnerability than CVE-2021-39267 and CVE-2021-39268. 10. CVE-2021-45896. 269.An UPSERT is an ordinary INSERT statement that is followed by one or more ON CONFLICT clauses, as shown in the syntax diagram above. The syntax in between the "ON CONFLICT" and "DO" keywords is called the "conflict target". The conflict target specifies a uniqueness constraint that will trigger the upsert. The conflict target may be omitted on ... garden of words manga chapter 1 An UPSERT is an ordinary INSERT statement that is followed by one or more ON CONFLICT clauses, as shown in the syntax diagram above. The syntax in between the "ON CONFLICT" and "DO" keywords is called the "conflict target". The conflict target specifies a uniqueness constraint that will trigger the upsert. The conflict target may be omitted on ...For example, [condition1] AND [condition2] will be true only when both condition1 and condition2 are true. Syntax Following is the basic syntax of AND operator with WHERE clause. SELECT column1, column2, columnN FROM table_name WHERE [condition1] AND [condition2]...AND [conditionN]; You can combine N number of conditions using AND operator. eukaryotic cell parts and functions TEMI Electric Train Toy Set Car Railway and Tracks Game Boys Toys for Children. $49.99. 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Tags: FFI, Database, SQL, Sqlite. idleon warrior build Code 3 commits Failed to load latest commit information. src .gitignore Cargo.lock Cargo.toml README.md README.md Rust SQLite3 example Development Requirements rustup Rust 1.35.0 rustup install 1.35.0 rustup default 1.35.0 rustup component add rls rust-analysis rust-src rustfmt clippy Run (debug) cargo run Build (release) cargo build --release Jul 14, 2022 · libsqlite3-sys is a separate crate from rusqlite that provides the Rust declarations for SQLite's C API. By default, libsqlite3-sys attempts to find a SQLite library that already exists on your system using pkg-config, or a Vcpkg installation for MSVC ABI builds. You can adjust this behavior in a number of ways: visible hotspot reddit 3m window film installers near me. exmark safety switch x bmw harman kardon. russian style weightlifting programSwaggerUI generation example for Golang Oct 02, 2022 Small golang server to push PgSQL listen/notify events into websockets Oct 02, 2022 Examples of Golang compared to Node.js for learning Oct 02, 2022 A toolbox of non-trivial Contentful interactions Oct 02, 2022 A beginner friendly repository made specifically for open source beginners Oct 02 ... white quartz countertops Cargoでプロジェクト作成後、Cargo.tomlでライブラリの指定をします。. % cargo new rusqlite-example % cd rusqlite-example. [dependencies] rusqlite = "*". main.rsにsqliteへアクセスするためのコードを書いていきます。. まずはuseと構造体の定義。. さきほどcreate tableしたpersonテーブル ...The example below does just this: ... rusqlite::Connection: sqlite_pool: Memcache: memcache: 0.15: memcache::Client: memcache_pool: The above table lists all the supported database adapters in this library. In order to use particular Poolable type that's included in this library, you must first enable the feature listed in the "Feature ...In SQLite, I cannot make a varchar field nullable. In MySQL, I cannot reliably make a varchar field nullable. Expected Behavior. Per my example below configured for SQLite: bloombergIBAddress should be varchar NULL. Actual Behavior. Per my example below configured for SQLite: bloombergIBAddress is varchar NOT NULL. Steps to Reproduce proc mixed lsmeans ods output gnuradio constellation receiver example Serde Rusqlite . This crate provides convenience functions to bridge serde and rusqlite . With their help you can "deserialize" rusqlite Row's into serde Deserialize types and "serialize" types implementing Serialize into bound query arguments (positional or named) that > rusqlite expects. aetna prior authorization form outpatient Rusqlite examples Sep 03, 2021 · SQLite is an in-process library that implements a self-contained, serverless, zero-configuration, transactional SQL database engine. It is free and you don’t need to buy any license to use it. Rusqlite. Rusqlite is an ergonomic wrapper for using SQLite from Rust. Historically, the API was based on the one from rust-postgres. However, the two have diverged in many ways, and no compatibility between the two is intended. Usage. ... Simple example usage: use rusqlite:: ...Notes on building rusqlite and libsqlite3-sys. libsqlite3-sys is a separate crate from rusqlite that provides the Rust declarations for SQLite's C API. By default, libsqlite3-sys attempts to find a SQLite library that already exists on your system using pkg-config, or a Vcpkg installation for MSVC ABI builds. aarp bus trips for seniors Jul 14, 2022 · libsqlite3-sys is a separate crate from rusqlite that provides the Rust declarations for SQLite's C API. By default, libsqlite3-sys attempts to find a SQLite library that already exists on your system using pkg-config, or a Vcpkg installation for MSVC ABI builds. You can adjust this behavior in a number of ways: 1.0.0 · source · [ −] pub struct Chars<'a> { /* private fields */ } An iterator over the char s of a string slice. This struct is created by the chars method on str . See its documentation for more.In the above syntax we use the create index statement to create a new index, here the specified index name means actual index name that we need to create. ON and INDEX is keyword and specified table means exited table with column name. Here unique is an optional part of this syntax if we have more than one column and that value we need to ... pelvic pain after covid vaccine reddit