query.setUserName("admin"); SysUser sysUser = sysUserMapper.selectByIdOrUserName(query); Assert.assertNotNull(sysUser); // 只按userName查询 query.setId(null); sysUser = sysUserMapper.selectByIdOrUserName(query); Assert.assertNotNull(sysUser); // id 和 userName 都为空 query.setUserName(nu...
PostgreSQL: INSERT INTO Statement The INSERT INTO statement in PostgreSQL is used to add new rows of data into a specified table. It’s one of the most commonly used commands in SQL, allowing you to insert a single row, multiple rows, or even data from another table using a subquery. Sy...
INSERT INTO COMPANY (ID,NAME,AGE,ADDRESS,SALARY,JOIN_DATE) VALUES (1, 'Paul', 32, 'California', 20000.00,'2001-07-13'); 1. 下面的示例是插入一行;此处的薪水列中被省略,因此将具有默认值 - INSERT INTO COMPANY (ID,NAME,AGE,ADDRESS,JOIN_DATE) VALUES (2, 'Allen', 25, 'Texas', '2007-...
1.select into postgres=# explain analyzeselectcount(*)intovaafromtest t1,test1 t2wheret1.id=t2.id ; QUERY PLAN---Finalize Aggregate (cost=34244.16..34244.17rows=1width=8) (actualtime=742.736..774.923rows=1loops=1)->Gather (cost=34243.95..34244.16rows=2width=8) (actualtime=740.223..774.90...
INSERT 语法 命令语法[ WITH [ RECURSIVE ] with_query [, ...] ] INSERT INTO table_name [ AS alias ] [ ( column_name [, ...] ) ] [ OVERRIDING { SYSTEM | USER } VALUE ] { DEFAULT VALUES | VALUES ( { exp…
1 首先数据表中要有一个子增长的字段。字段类型设置成：然后，在该字段的属性里边会有一个序列：继续，通常我们都这样来插入数据：query("insert into ...");紧接着执行这样的sql，就会得到刚才插入的id值result =query("select currval('address_address_id_seq')"); // 加粗部分就是上边红框内...
The output for the above query is: As expected, this query gave us an error so we need to have the same datatype of columns in both the tables. Conclusion INSERT INTO SELECT is a very useful statement in PostgreSQL which allows us to select or copy some data from one table and insert...
The metadata column stores JSON data, which can be queried and manipulated using PostgreSQL's JSON functions. Insert with CURRENT_TIMESTAMPThis example demonstrates how to insert the current timestamp into a table: insert_timestamp.sql -- CREATE TABLE books ( -- book_id INTEGER PRIMARY KEY, ...
This document discusses how to insert data into a table using PostgreSQL INSERT command. We have also covered how to do the same using PHP-PostgreSQL.
postgresqlinsertintoselect⽆法使⽤并⾏查询的解决 本⽂信息基于PG13.1。从PG9.6开始⽀持并⾏查询。PG11开始⽀持CREATE TABLE … AS、SELECT INTO以及CREATE MATERIALIZED VIEW的并⾏查询。先说结论：换⽤create table as 或者select into或者导⼊导出。⾸先跟踪如下查询语句的执⾏计划：select ...