mysql-下面两个查询语句有什么区别
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责编：小采
时间：2020-11-09 16:56:36
mysql-下面两个查询语句有什么区别
mysql-下面两个查询语句有什么区别:mysqlsqloracle SELECT A.YWSJMS1 as ywsjms1 ,A.YWSJMS1 as ywsjms2,A.YWSJ1 as ywsj1,A.cjsj as cjsj,B.DDLB as ddlb from GY_XT_CZJL A, SW_DD_JL B where A.SCBJ= 0 AND B.SCBJ=0 AND A.YWSN=B.SNSELECT A.YWSJMS1 as ywsjms1 ,A.YWSJMS1 as ywsjms2,A.
导读mysql-下面两个查询语句有什么区别:mysqlsqloracle SELECT A.YWSJMS1 as ywsjms1 ,A.YWSJMS1 as ywsjms2,A.YWSJ1 as ywsj1,A.cjsj as cjsj,B.DDLB as ddlb from GY_XT_CZJL A, SW_DD_JL B where A.SCBJ= 0 AND B.SCBJ=0 AND A.YWSN=B.SNSELECT A.YWSJMS1 as ywsjms1 ,A.YWSJMS1 as ywsjms2,A.
mysqlsqloracle
SELECT A.YWSJMS1 as ywsjms1 ,A.YWSJMS1 as ywsjms2,A.YWSJ1 as ywsj1,A.cjsj as cjsj,B.DDLB as ddlb from GY_XT_CZJL A, SW_DD_JL B where A.SCBJ= 0 AND B.SCBJ=0 AND A.YWSN=B.SNSELECT A.YWSJMS1 as ywsjms1 ,A.YWSJMS1 as ywsjms2,A.YWSJ1 as ywsj1,A.cjsj as cjsj,B.DDLB as ddlb from GY_XT_CZJL A LEFT JOIN SW_DD_JL B ON A.SCBJ= 0 AND B.SCBJ=0 AND A.YWSN=B.SN
mysql-下面两个查询语句有什么区别
mysql-下面两个查询语句有什么区别:mysqlsqloracle SELECT A.YWSJMS1 as ywsjms1 ,A.YWSJMS1 as ywsjms2,A.YWSJ1 as ywsj1,A.cjsj as cjsj,B.DDLB as ddlb from GY_XT_CZJL A, SW_DD_JL B where A.SCBJ= 0 AND B.SCBJ=0 AND A.YWSN=B.SNSELECT A.YWSJMS1 as ywsjms1 ,A.YWSJMS1 as ywsjms2,A.
