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037.PGSQL-事务 savepoint 保存点、rollback to 回滚

作者：互联网

事务

savepoint 保存点

rollback to 回滚

 

开启一个事务需要将SQL命令用BEGIN和COMMIT命令包围起来

BEGIN;
UPDATE accounts SET balance = balance - 100.00
    WHERE name = 'Alice';
SAVEPOINT my_savepoint;
UPDATE accounts SET balance = balance + 100.00
    WHERE name = 'Bob';
-- oops ... forget that and use Wally's account
ROLLBACK TO my_savepoint;
UPDATE accounts SET balance = balance + 100.00
    WHERE name = 'Wally';
COMMIT;

 

标签：SET,rollback,savepoint,UPDATE,PGSQL,accounts,balance,WHERE
来源： https://www.cnblogs.com/star521/p/15067525.html