什么数据库，不同不一样写法
sql server参考https://blog.csdn.net/jameshelong/article/details/16963881
mysql参考https://blog.csdn.net/m0_56118578/article/details/123349910
orcle参考https://blog.csdn.net/qq_39073684/article/details/106696977
1min目标场景问卷
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