use sqlx::QueryBuilder; let mut builder = QueryBuilder::new("SELECT * FROM users WHERE 1=1"); if let Some(name) = name_filter { builder.push(" AND name = ").push_bind(name); } if let Some(age) = age_filter { builder.push(" AND age > ").push_bind(age); } let query =...
async fn batch_insert_users(pool: &PgPool, users: &[(&str, Uuid)]) -> Result<(), sqlx::Error> { let mut query_builder: sqlx::QueryBuilder<Postgres> = sqlx::QueryBuilder::new( "INSERT INTO users (id, name) " ); query_builder.push_values(users, |mut b, (name, uuid)| { b...
使用query()方法执行SQL查询语句时,需要手动指定返回结果的类型,例如: usesqlx::{MySqlPool, Row};#[derive(Debug)]structUser{ id:i32, name:String, }#[tokio::main]asyncfnmain() - >Result< (), sqlx::Error > {letpool = MySqlPool::connect("mysql://username:password@hostname:port/database")...
11. Diesel提供了强大的查询构建器(query builder)来自动生成SQL查询语句。但有时候,我们可能需要进行更复杂的查询,或者执行一些特定的SQL操作。在这种情况下,我们可以使用sql_query方法来执行自定义查询。 以下是一个示例,用于执行自定义的查询,并返回结果: usediesel::sql_query; ...
SQL [sql] Generic launchbadge/sqlx - async PostgreSQL/MySQL/SQLite connection pool with strong typing support SeaQL/sea-query - 🔱 A dynamic SQL query builder for MySQL, Postgres and SQLite SeaQL/sea-schema - 🌿 SQL schema definition and discovery Microsoft SQL prisma/tiberius - ...
Executed SQL: SELECT * FROM posts WHERE user_id = 1; Complex queries Diesel's powerful query builder helps you construct queries as simple or complex as you need, at zero cost. let versions = Version::belonging_to(krate) .select(id) .order(num.desc()) .limit(5); let downloads = ...
SQL [sql] Generic launchbadge/sqlx - async PostgreSQL/MySQL/SQLite connection pool with strong typing support SeaQL/sea-query - 🔱 A dynamic SQL query builder for MySQL, Postgres and SQLite SeaQL/sea-schema - 🌿 SQL schema definition and discovery Microsoft SQL prisma/tiberius - ...
Raw SQL There will always be certain queries that are just easier to write as raw SQL, or can't be expressed with the query builder. Even in these cases, Diesel provides an easy to use API for writing raw SQL. #[derive(QueryableByName)]#[diesel(table_name = users)]structUser{ id:i3...
[point1, point2]; let request = WriteRequest::new(points); client.write(request).unwrap();}使用Query API查询数据 可以使用Query API来查询数据，这样可以更方便地查询数据。可以使用InfluxDB 2.x的客户端库来查询数据。use influxdb2::Client;use influxdb2::models::{QueryRequest, Query, Query...
letquery=sqlx::query("SELECT MY_FUNCTION() FROM my_table"); 1. 请将MY_FUNCTION()替换为实际的 MySQL 函数名称,并将my_table替换为实际的表名。 3. 执行 SQL 查询 执行SQL 查询时,我们需要使用连接池中的连接,并将查询结果的类型指定为我们期望的类型。以下是一个示例: ...