創建MySQL函數時出現語法錯誤

Question

CREATE FUNCTION count(name varchar(20)) 
     RETURNS integer 
     BEGIN 
     DECLARE d_count integer; 
       select count(*) into d_count 
       from ins 
       where ins.name = name 
     RETURN d_count; 
     END 

上面的SQL代碼顯示有語法錯誤。

You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'RETURN (d_count); END' at line 8 

任何想法如何解決它？

Answer 1

語法錯誤，你的SELECT語句後錯過; -

CREATE FUNCTION count (name varchar(20)) 
RETURNS integer 
BEGIN 
    DECLARE d_count integer; 
    SELECT COUNT(*) INTO d_count FROM ins WHERE ins.name = NAME; 
    RETURN d_count; 
END 

Answer 2

試試這個

CREATE FUNCTION count(@name varchar(20)) 
     RETURNS integer 
     BEGIN 

     RETURN(select count(*) 
       from ins 
       where ins.name = @name); 

     END