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灵活运用mysql中join的on标准内能够带and创建好几条

时间:2021-03-27 22:44来源:未知 作者:jianzhan 点击:
mysql join on 能够带and,比如:SELECT pa.name as name, pa.sn as sn, re.created, sl.sn, re.phase, rd.times, ABS(sl.quantity) as quantity, dr.name as dname, dr.specifications as specificationsFROM rr AS re JOIN red AS rd ON re.id = rd

mysql join on 能够带and,比如:
SELECT pa.name as name, pa.sn as sn, re.created, sl.sn, re.phase, rd.times, ABS(sl.quantity) as quantity, dr.name as dname, dr.specifications as specifications
FROM rr AS re JOIN red AS rd ON re.id = rd.rid JOIN drug AS dr ON dr.id = rd.did JOIN {{bbbb}} AS sl ON re.id = sl.r_id AND sl.d_id = rd.d_id JOIN pp AS pa ON pa.id = re.p_id
WHERE $where AND sl.receive_id 0
用以将被join表沒有相匹配数据信息的情况下还可以将主join表的数据信息显示信息出去

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