标签：last 方案 div lse mys end select address book
一、问题
Postgresql中无则插入的使用方法INSERT INTO WHERE NOT EXISTS，用法请参考样例。
二、解决方案
（1）PostgresSQL
INSERT INTO test_tab(name,sex,address,lastEndTime,createTime) SELECT ‘a‘,‘b‘,‘c‘,1,1 FROM (select 1) tmp WHERE NOT EXISTS (Select 1 FROM test_tab where name = ‘0‘)
（2）MySQL(使用系统临时表DUAL)
INSERT INTO `test_tab`(`name`,`age`,`addresss`) SELECT ‘aa‘,2,‘bb‘ FROM DUAL WHERE NOT EXISTS(SELECT 1 FROM `test_tab` Where name == ‘aa‘)
（3）SQLServer
IF NOT EXISTS (SELECT id FROM books WHERE id = 1) INSERT INTO books (name) SELECT ‘Songxingzhu‘
Postgresql中无则插入的使用方法INSERT INTO WHERE NOT EXISTS
标签：last 方案 div lse mys end select address book
原文地址：https://www.cnblogs.com/songxingzhu/p/11941174.html
