1：
CREATE PROCUDURE DELETE_MATCHES
(IN P_PLAYERNO INTEGER)
BEGIN
DELETE
FROM
WHERE PLAYERNO=P_PLAYERNO
END
2:
BEGIN
BEGIN
BEGIN
END;
END;
END
3:
CREATE PROCEDURE TEST
(OUT NUMBER1 INTEGER)
BEGIN
DECLARE NUMBER2 INTEGER DEFAULT 100;
SET NUMBER1=NUMBER2;
END
CALL TEST(@NUMBER)
SELECT @NUMBER
3:
CREATE PROCEDURE DIFFERENCE
(IN P1 INTEGER,IN P2 INTEGER,OUT P3 INTEGER)
BEGIN
IF P1>P2 THEN
SET P3=1;
ELSEIF P1=P2 THEN
SET P3=2;
ELSE
SET P3=3;
END IF;
END
4:
CREATE PROCEDURE AGE
(IN START_DATE DATE,
IN END_DATE DATE,
OUT YEARS INTEGER,
OUT MONTHS INTEGER,
OUT DAYS INTEGER)
BEGIN
DECLARE NEXT_DATE, PREVIOUS_DATE DATE;
SET YEARS = 0;
SET PREVIOUS_DATE = START_DATE;
SET NEXT_DATE = START_DATE + INTERVAL 1 YEAR;
WHILE NEXT_DATE < END_DATE DO
SET YEARS = YEARS + 1;
SET PREVIOUS_DATE = NEXT_DATE;
SET NEXT_DATE = NEXT_DATE + INTERVAL 1 YEAR;
END WHILE;
SET MONTHS = 0;
SET NEXT_DATE = PREVIOUS_DATE + INTERVAL 1 MONTH;
WHILE NEXT_DATE < END_DATE DO
SET MONTHS = MONTHS + 1;
SET PREVIOUS_DATE = NEXT_DATE;
SET NEXT_DATE = NEXT_DATE + INTERVAL 1 MONTH;
END WHILE;
SET DAYS = 0;
SET NEXT_DATE = PREVIOUS_DATE + INTERVAL 1 DAY;
WHILE NEXT_DATE <= END_DATE DO
SET DAYS = DAYS + 1;
SET PREVIOUS_DATE = NEXT_DATE;
SET NEXT_DATE = NEXT_DATE + INTERVAL 1 DAY;
END WHILE;
END
;
SET @START = '1991-01-12'
;
SET @END = '1999-07-09'
;
CALL AGE (@START, @END, @YEAR, @MONTH, @DAY)
;
计算两个日期之间的年数、月数和天数。
5：
CREATE PROCEDURE WAIT
(IN WAIT_SECONDS INTEGER)
BEGIN
DECLARE END_TIME INTEGER
DEFAULT NOW() + INTERVAL WAIT_SECONDS SECOND;
WAIT_LOOP: LOOP
IF NOW() > END_TIME THEN
LEAVE WAIT_LOOP;
END IF;
END LOOP WAIT_LOOP;
END
创建存储过程，在指定的时间内部响应。
6：
leave相当于break
iterate相当于continue，不过后边都得加响应的语句块
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