是否可以在不将WHERE
其加入其他表的情况下执行语句?例如:
Table1(t1_id,name)
Table2(t2_id, fk_t1_id, something)
Table3(t3_id, fk_t2_id, blah)
我想做这个:
SELECT name, something
FROM table1
JOIN table2 ON t1_id = fk_t1_id
WHERE blah = 'somestring'
还是我也必须加入 table3 才能使WHERE
语句生效?