如何使用mysql在子查询结果中设置默认 VALUE
SELECT
p.`id`, p.`name`, p.`class_name`, cpd.`status_team`,
cpd.`home`, cpd.`guest`, cpd.`mvp`, cpd.`oscar`,
cpd.`wam`, cpd.`status`, cpd.`added_date`,
(SELECT result FROM result_cards WHERE `id` = cpd.`result`) AS DEFAULT(`result`)
FROM `cron_players_data` cpd
INNER JOIN `players` p ON cpd.`player_id` = p.id
WHERE cpd.`added_date` = '2012-03-29' AND cpd.team_id = '15'
当我删除此 DEFAULT() 时，查询将正常执行。实际上，我希望默认 result 值为 0 或帮助非常感谢
最佳答案
解决方案 IFNULL
SELECT
p.`id`,p.`name`,p.`class_name`,cpd.`status_team`,cpd.`home`,cpd.`guest`,cpd.`mvp`,
cpd.`oscar`,cpd.`wam`,cpd.`status`,cpd.`added_date` ,
IFNULL((SELECT result FROM result_cards WHERE `id` = cpd.`result`),0) AS `result`
FROM `cron_players_data` cpd INNER JOIN `players` p ON cpd.`player_id` = p.id
WHERE cpd.`added_date` = '2012-03-29' AND cpd.team_id = '15'
关于mysql - 如何使用mysql在子查询结果中设置默认值，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/9928780/