为什么不能这样写:SELECT * FROM A a,B b,C c WHERE a.id=b.id AND c.id=a.id AND A=1,
会报:column: b is not existed in either c or select clause这样的错误
a.id=1
FROM A, B, C
WHERE A.id = B.id
AND A.id = C.id
AND A.id = 1 --bug在此
A=1 ??
a.id=1主要是后面的where条件,还有报错
追答SELECT *FROM A, B, C
WHERE A.id = B.id
AND A.id = C.id
AND A.id = 1 --bug在此
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第1个回答 2015-04-30
我想知道最后的A=1是啥意思