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                > ### ***存儲過程就是一組為了完成特定功能的SQL語句集,簡單地說就是一堆SQL組成的語句!*** 在存儲過程中可以寫一些邏輯結構,就像PHP一樣可以定義變量,邏輯運算! ``` #語法 delimiter ;; create definer=`root`@`localhost` procedure `proc_adder`(in a int, in b int, out sum int) begin #這里寫邏輯 declare c int; if a is null then set a = 0; end if; if b is null then set b = 0; end if; set sum = a + b; end ;; delimiter ; ``` PHP簡單調用存儲過程 ``` $conn = mysql_connect('localhost','root','root') or die ("數據連接錯誤!!!"); mysql_select_db('test',$conn); $sql = " create procedure myproce() begin INSERT INTO user (id, username, sex) VALUES (NULL, 's', '0'); end;? "; mysql_query($sql);//創建一個myproce的存儲過程 $sql = "call test.myproce();"; mysql_query($sql);//調用myproce的存儲過程,則數據庫中將增加一條新記錄。 ```
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