mysql-下面两个查询语句有什么区别
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2024-02-01 09:18:16
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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