Postgresql中无则插入的使用方法INSERT INTO WHERE NOT EXISTS

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',,
FROM (select ) tmp WHERE NOT EXISTS (Select  FROM test_tab where name = '')

（2）MySQL(使用系统临时表DUAL)

INSERT INTO `test_tab`(`name`,`age`,`addresss`)
SELECT 'aa',,'bb'
FROM DUAL WHERE NOT EXISTS(SELECT  FROM `test_tab` Where name == 'aa')

（3）SQLServer

IF NOT EXISTS (SELECT id FROM books WHERE id = )  INSERT INTO books (name) SELECT 'Songxingzhu'