2.多表关联更新时,使用再加上inner join 或 left join等连接,示例如下 UPDATE t_user_bank b SET is_active='是' FROM t_user_arch u INNER JOIN t_deposit d ON u.arch_id=d.arch_id WHERE u.arch_id=b.arch_id and d.balance=0 and u.rec_no='2021090306002' 二、想用多表关联查询并且dele...
mysql> update [表名] set age = 25 where name =’aaa’; 修改数据 mysql> delete form [表名] where name = ‘bbb’; 删除数据 MySQL数据类型与操作 数值类型:tinyint、int、float、double 字符类型:char、varchar、text、enum 日期类型:datetime 特殊的值:NULL MySQL中的运算符 算数运算符:+ - * / ...
BEGIN;DELETE FROM COMPANY WHERE AGE = 25;ROLLBACK; lock 锁主要是为了保持数据库数据的一致性,可以阻止用户修改一行或整个表,一般用在并发较高的数据库中。在多个用户访问数据库的时候若对并发操作不加控制就可能会读取和存储不正确的数据,破坏数据库的一致性。数据库中有两种基本的锁:排它锁(Exclusive Locks)...
from pro_produced_component a left join pro_factory pf on a.factory_id = pf.id left join pro_component_type b on a.type = b.code and coalesce(pf.company_id, ''') = coalesce(b.company_id, ''') left join pro_project_area d on a.area_id = d.id left join pro_project_area p...
(c.oid)ASvacuum_count,pg_stat_get_autovacuum_count(c.oid)ASautovacuum_count,pg_stat_get_analyze_count(c.oid)ASanalyze_count,pg_stat_get_autoanalyze_count(c.oid)ASautoanalyze_countFROMpg_class cLEFTJOINpg_index iONc.oid=i.indrelidLEFTJOINpg_namespace nONn.oid=c.relnamespaceWHEREc.rel...
SELECT `DictTypeId`,`Value`,`Code`,`OrderNo`,`Remark`,`Status`,`CreateTime`,`UpdateTime`,`CreateUserId`,`UpdateUserId`,`IsDelete`,`Id` FROM `SysDictData` WHERE ( `DictTypeId` = 14544926246725 ) AND ( `IsDelete` = 0 )ORDER BY `OrderNo` ASC【MySQL数据库---异常 2023/10/11 星期...
Use the DELETE command to request resource deletion. SELECTstatus, content_type, content::json->>'url'ASurlFROMhttp_delete('http://httpbun.com/delete'); status | content_type | url ---+---+--- 200 | application/json | http://httpbun.com/delete As a shortcut to send data to a...
Bump version to 1.5, add upgrade script, add tests for DELETE with data 3年前 http--1.3--1.4.sql Update http--1.3--1.4.sql 3年前 http--1.4--1.5.sql Bump version to 1.5, add upgrade script, add tests for DELETE with data
SELECT status, content_type, content::json->>'url' AS url FROM http_delete('http://httpbun.com/delete');status | content_type | url ---+---+--- 200 | application/json | http://httpbun.com/delete As a shortcut to send data to a GET request, pass a JSONB data...
DELETE删除一个表中的行。DELETE FROM [ ONLY ] table [ WHERE condition ]DROP AGGREGATE删除一个用户定义的聚集函数。DROP AGGREGATE name ( type ) [ CASCADE | RESTRICT ]DROP CAST删除一个用户定义的类型转换。DROP CAST (source_type AS target_type) [ CASCADE | RESTRICT ]...