roadrunnermysqllect定义变量,Mysql：在lect中设置⼀个变量SELECT alias.urname AS phone_number,
subscriber.urname AS ur_name
FROM alias, subscriber
began是什么意思
act REGEXP CONCAT('^sip:', subscriber.ur_name, '[.*]')请注意，以下查询将更有效：
SELECT alias.urname AS phone_number,
有效载荷subscriber.urname AS ur_name
FROM alias, subscriber
act LIKE CONCAT('sip:', subscriber.ur_name, '%')，⽽这个虽然看起来很复杂，但效率更⾼：
CREATE FUNCTION fn_get_next_subscriber(initial VARCHAR(200)) RETURNS VARCHAR(200)
NOT DETERMINISTIC
READS SQL DATA
BEGIN中考知识点
afraid怎么读>carrie underwoodDECLARE _urname VARCHAR(200);
DECLARE EXIT HANDLER FOR NOT FOUND RETURN UNHEX('FFFF');
medicine怎么读
SELECT urname
谷歌日语在线翻译
INTO _urname
FROM subscribers
WHERE urname>= initial
AND urname NOT LIKE CONCAT(initial, '%')
ORDER BY
urname
LIMIT 1;
RETURN _urname;
END
SELECT a.urname AS phone_number,in esnce
s.urname AS ur_name
堵车英文
FROM (
SELECT si.*, CONCAT('sip:', urname) AS fromcontact
FROM subscriber si
) s, alias a
act >= fromcontact
act < fn_get_next_subscriber(fromcontact)这将使⽤alias (contact)上的索引并避免全表扫描。
在我的博客中看到这篇⽂章：
