窗口1 SELECT*FROMnumber_of_formWHEREyear='24'ANDmonth='02'FORUPDATE;UPDATEnumber_of_formSETnumber=3WHEREuuid={{your_uuid}}; 另外需要注意的是,我再DataGrip中,将提交设置为了手动。这样才能在执行的时候,触发另一个语句。 此时,数据如下所示 同步进行 窗口2 UPDATEnumber_of_formSETnumber=(SELECTnumber...
我们还可以通过select * from a for update of a.a;(a表的a列)对记录中的某一列进行锁定。 当我们使用FOR UPDATE子句将记录锁定后,其他进程在对锁定记录进行update或delete操作时,就会处于停顿状态,等待解锁。当锁定进程释放锁定以后才会继 续执行。如果不想其他进行进入停顿状态,可以用nowait子句,直接返回操作异...
String sql= "";if(dbType.contains("postgresql")) { Statement statement=session.connection().createStatement(); statement.setQueryTimeout(5); sql= "SELECT * FROM EMS_SYSTEM_DEVICE WHERE NAME='CMS' FOR UPDATE"; statement.execute(sql); }else{ sql= "SELECT * FROM EMS_SYSTEM_DEVICE WHERE NA...
SELECT * FROM products WHERE name='Mouse' FOR UPDATE; 例3: (主键不明确,table lock) SELECT * FROM products WHERE id<>'3' FOR UPDATE; 例4: (主键不明确,table lock) SELECT * FROM products WHERE id LIKE '3' FOR UPDATE; 注1: FOR UPDATE 仅适用于InnoDB,且必须在事务区块(BEGIN/COMMIT)中...
PostgreSQL version 17.5 is now available on Amazon RDS. This release contains several fixes and improvements for PostgreSQL announced in the PostgreSQL 17.5 release. General enhancements Fixed for the address_standardizer_data_us extension issue regarding ALTER EXTENSION UPDATE failure. Changed the Oracle...
【Oracle笔记】select for update的用法及实例解析 一、它有什么作用 select for update 是为了在查询时,避免其他用户以该表进行插入,修改或删除等操作,造成表的不一致性。 二、举几个例子: select * from t for update 会等待行锁释放之后,返回查询结果。 select * from t for update nowait 不等待行锁释放...
Babelfish for Aurora PostgreSQL 5.1 This release of Aurora Babelfish is provided with Aurora PostgreSQL 17.4. For more information about the improvements in Aurora PostgreSQL 17.4, see Amazon Aurora PostgreSQL updates. Babelfish for Aurora PostgreSQL 5.1 adds several new features, enhancements, and fixes...
percona/percona-postgresql-operator:2.6.0-ppg17.4-pgbackrest2.54.2, percona/pmm-client:2.44.0. before The deployment rollout will be automatically triggered by the applied patch. The update process is successfully finished when all Pods have been restarted. ...
Navicat for PostgreSQL (Windows) version 17.1.10 Bug-fixes: Multi-line editing did not work in Query Editor. Crashed when deleting "My Connections". Crashed when copying UPDATE statements from query results. Minor bug fixes and improvements. To upgrade, please visit our Customer Center. Nov 4 ...
AnalyticDB for PostgreSQL(原HybridDB for PostgreSQL,以下简称 ADB PG)是阿里云上的MPP数据仓库服务,其内核采用PostgreSQL引擎,基于开源数据库 Greenplum 改造,并在此基础上优化分析性能,其中列存储 metascan 就是提升数据库查询性能的一个关键特性。 ADB PG支持列存储格式,具有较高的数据压缩能力,以及查询性能,但是当针...