Comparison Expressionuser_id=2
Comparison Expressionbanned_id=6
ParentBool Expression(And Expression)
Comparison Expressionbanned_id=7
Comparison Expressionstar_num=5
Left
Comparison Expressionuser_id=1
Comparison Expressionproduct_id=3
ParentBool Expression(Or Expression)
第一步:
第四步:
And Expression
Comparison Expressionstar_num=4
Right
Or Expression
SQL解析过程
第三步:
第二步:
