if not exists(select * from table1 where mid='aa')
INSERT INTO table1(mid,name,msg) VALUES('aa','bb','cc') 参考例子:
if not exists (select * from mobile_menu_settings where menu_code = 'workload')
INSERT INTO [dbo].[mobile_menu_settings]([menu_code], [menu_name], [is_enabled], [is_enabledDept], [imgName], [pageUrl], [menuType], [serialNo]) VALUES ('workload', '医嘱执行记录', 0, NULL, 'mdi-format-indent-increase', 'workload.html', 3, 7);数据已存在时,执行不会插入数据


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