MySql 创建触发器以插入计算值时出现语法错误

Question

This is my first time trying to create a MySql trigger but I'm running into syntax errors that I can't identify. I am trying to have the trigger insert a calculated value when a row is updated. Below is my code, but I keep getting syntax errors when I try to execute it, and I cannot see where the error is. Can someone please look, what am I doing wrong?

DROP TRIGGER ins_cop_dhw;
CREATE TRIGGER ins_cop_dhw BEFORE INSERT ON `2017010001_data`
   FOR EACH ROW 
   BEGIN
       IF (NEW.`_007E` = 1 AND `_00A2` > 0) THEN
           SET NEW.`_00B7` = NEW.`_0096` / NEW.`_00A2`;
       END IF;
       IF (NEW.`_007D` = 1 AND `_00A2` > 0) THEN
           SET NEW.`_00B8` = (NEW.`_0096` / NEW.`_00A2`);
       END IF;
   END;

Here is the error I get in MySQL Workbench, but it's not much help. :/

Error Code: 1064. 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 '' at line 5

MySQL Workbench highlights the end of line 6 as the start of the syntax error.

Answer 1

As said by @Akina I was missing the delimiter statements. Here is fixed code.

delimiter //
DROP TRIGGER ins_cop_dhw;
CREATE TRIGGER ins_cop_dhw BEFORE INSERT ON `2017010001_data`
   FOR EACH ROW 
   BEGIN
       IF (NEW.`_007E` = 1 AND NEW.`_00A2` > 0) THEN
           SET NEW.`_00B7` = NEW.`_0096` / NEW.`_00A2`;
       END IF;
       IF (NEW.`_007D` = 1 AND NEW.`_00A2` > 0) THEN
           SET NEW.`_00B8` = (NEW.`_0096` / NEW.`_00A2`);
       END IF;
   END//
   delimiter ;

As per the advice of @Akina I read the Create Procedure documentation from the dev.mysql.com site and the below quote highlighted the importance of using delimiter

The example uses the mysql client delimiter command to change the statement delimiter from; to // while the procedure is being defined. This enables the; delimiter used in the procedure body to be passed through to the server rather than being interpreted by mysql itself. See Section 25.1, “Defining Stored Programs”.