select * from table_a a,table_b b where a.col1 = b.col1(+) ;最后的(+)怎么解释?
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![select * from table_a a,table_b b where a.col1 = b.col1(+) ;最后的(+)怎么解释?](/uploads/image/z/14841706-58-6.jpg?t=select+%2A+from+table_a+a%2Ctable_b+b+where+a.col1+%3D+b.col1%28%2B%29+%3B%E6%9C%80%E5%90%8E%E7%9A%84%28%2B%29%E6%80%8E%E4%B9%88%E8%A7%A3%E9%87%8A%3F)
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select * from table_a a,table_b b where a.col1 = b.col1(+) ;最后的(+)怎么解释?
select * from table_a a,table_b b where a.col1 = b.col1(+) ;最后的(+)怎么解释?
select * from table_a a,table_b b where a.col1 = b.col1(+) ;最后的(+)怎么解释?
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