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                ## 存儲過程 - 語法 存儲過程和函數就是事先經過編譯并存儲在數據庫中的一組SQL語句集合,功能強大,可以實現一些比較復雜的邏輯功能。 存儲過程和函數的區別在于函數必須有返回值,而存儲過程沒有; 存儲過程的參數可以是 IN、OUT、INOUT 類型,而函數只能是 IN 類型。 創建存儲過程語法: CREATE [DEFINER = { user | CURRENT_USER }] PROCEDURE sp_name ([proc_parameter[,...]]) [characteristic ...] routine_body 調用存儲過程: CALL sp_name(parameter[,...]) 顯示存儲過程: SHOW PROCEDURE STATUS [LIKE 'pattern' | WHERE expr]; SHOW PROCEDURE STATUS 語句可查詢提供存儲過程的特征,包括數據庫,存儲過程名稱,類型,創建者等。 SHOW PROCEDURE STATUS; SHOW PROCEDURE STATUS WHERE db = 'studymysql'; SHOW PROCEDURE STATUS WHERE name LIKE '%employee%'; 顯示存儲過程定義: SHOW CREATE PROCEDURE procedure_name; 刪除存儲過程: DROP PROCEDURE [IF EXISTS] procedure_name;
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