Oracle LEFT JOIN中ON條件與WHERE條件的區別

Oracle LEFT JOIN中ON條件與WHERE條件的區別 JOIN中的ON條件與WHERE條件是一樣的,而LEFT JOIN卻不一樣 SQL> create table t1 as select * from scott.emp; 表已創建。 SQL> create table t2 as select * from scott.dept; 表已創建。 SQL> delete t2 whe

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