select uuid_in
时间: 2024-08-13 12:10:04 浏览: 59
`SELECT uuid_in` 这是一个SQL查询语句的一部分,通常用于从数据库中选择特定的列。`uuid_in`可能是一个列名,其中"uuid"是通用术语,表示全局唯一标识符(Universally Unique Identifier),通常用来作为行的主键或唯一的标识。
这个查询可能在查找具有特定UUID值的数据行。但是,没有更多的上下文,确切的意义无法确定,比如:
- 如果`uuid_in`是一个参数,那么可能是传入的UUID列表,查询将返回列表中的所有匹配项。
- 如果它是表名中的字段,那将直接查询该表的`uuid`列。
具体使用会依赖于数据库的结构和查询的目的。如果你想要更详细的解释或有其他疑问,请提供完整的查询语境或者询问以下问题:
1. UUID在数据库查询中的作用是什么?
2. 如何在SQL中传递多个UUID作为`uuid_in`参数?
3. 在什么情况下会选择使用`uuid_in`而不是直接写`uuid`?
相关问题
请将这个存储过程修改为触发器,当其余四个表插入新数据时,t_pcm_prod_own能够修改更新数据 CREATE DEFINER=root@% PROCEDURE test03() BEGIN -- 是否持有活期 IF EXISTS(SELECT CUST_ID FROM T_PCM_PROD_OWN WHERE CUST_ID IN (SELECT CUST_ID FROM T_PCM_DEP_CURR)) THEN UPDATE T_PCM_PROD_OWN SET IS_DEP = '1' WHERE CUST_ID IN (SELECT CUST_ID FROM T_PCM_DEP_CURR); ELSE UPDATE T_PCM_PROD_OWN SET IS_DEP = '0' WHERE CUST_ID IN (SELECT CUST_ID FROM T_PCM_DEP_CURR); END IF; -- 是否持有定期 IF EXISTS(SELECT CUST_ID FROM T_PCM_PROD_OWN WHERE CUST_ID IN (SELECT CUST_ID FROM T_PCM_DEP_FIXED)) THEN UPDATE T_PCM_PROD_OWN SET IS_FIXED_DEP = '1' WHERE CUST_ID IN (SELECT CUST_ID FROM T_PCM_DEP_FIXED); ELSE UPDATE T_PCM_PROD_OWN SET IS_FIXED_DEP = '0' WHERE CUST_ID IN (SELECT CUST_ID FROM T_PCM_DEP_FIXED); END IF; -- 是否持有贷款 IF EXISTS(SELECT CUST_ID FROM T_PCM_PROD_OWN WHERE CUST_ID IN (SELECT CUST_ID FROM T_PCM_LOAN)) THEN UPDATE T_PCM_PROD_OWN SET IS_LOAN = '1' WHERE CUST_ID IN (SELECT CUST_ID FROM T_PCM_LOAN); ELSE UPDATE T_PCM_PROD_OWN SET IS_LOAN = '0' WHERE CUST_ID IN (SELECT CUST_ID FROM T_PCM_LOAN); END IF; -- 是否持有理财 IF EXISTS(SELECT CUST_ID FROM T_PCM_PROD_OWN WHERE CUST_ID IN (SELECT CUST_ID FROM T_PCM_WEALTH)) THEN UPDATE T_PCM_PROD_OWN SET IS_WEALTH = '1' WHERE CUST_ID IN (SELECT CUST_ID FROM T_PCM_WEALTH); ELSE UPDATE T_PCM_PROD_OWN SET IS_WEALTH = '0' WHERE CUST_ID IN (SELECT CUST_ID FROM T_PCM_WEALTH); END IF; INSERT INTO T_PCM_PROD_OWN SELECT REPLACE(UUID(),'-','') ,T_PCM_CUST.CUST_ID ,T_PCM_CUST.LAW_ORG_ID ,T_PCM_CUST.ECIF_CUST_ID ,T_PCM_PROD_OWN.IS_DEP ,T_PCM_PROD_OWN.IS_FIXED_DEP ,T_PCM_PROD_OWN.IS_LOAN ,T_PCM_PROD_OWN.IS_WEALTH ,T_PCM_DEP_CURR.CURRENT_BAL ,T_PCM_DEP_FIXED.BAL ,T_PCM_LOAN.LOAN_MON ,T_PCM_WEALTH.CURRENT_BAL FROM T_PCM_CUST LEFT JOIN T_PCM_DEP_CURR ON T_PCM_CUST.CUST_ID = T_PCM_DEP_CURR.CUST_ID LEFT JOIN T_PCM_DEP_FIXED ON T_PCM_CUST.CUST_ID = T_PCM_DEP_FIXED.CUST_ID LEFT JOIN T_PCM_LOAN ON T_PCM_CUST.CUST_ID = T_PCM_LOAN.CUST_ID LEFT JOIN T_PCM_WEALTH ON T_PCM_CUST.CUST_ID = T_PCM_WEALTH.CUST_ID LEFT JOIN T_PCM_PROD_OWN ON T_PCM_CUST.CUST_ID = T_PCM_PROD_OWN.CUST_ID; END
您好!根据您的要求,将存储过程修改为触发器,当其余四个表插入新数据时,t_pcm_prod_own将能够修改更新数据。以下是修改后的触发器代码:
```mysql
CREATE DEFINER=root@% TRIGGER trg_test03
AFTER INSERT ON T_PCM_DEP_CURR
FOR EACH ROW
BEGIN
-- 是否持有活期
IF EXISTS(SELECT CUST_ID FROM T_PCM_PROD_OWN WHERE CUST_ID = NEW.CUST_ID) THEN
UPDATE T_PCM_PROD_OWN
SET IS_DEP = '1'
WHERE CUST_ID = NEW.CUST_ID;
ELSE
UPDATE T_PCM_PROD_OWN
SET IS_DEP = '0'
WHERE CUST_ID = NEW.CUST_ID;
END IF;
END;
CREATE DEFINER=root@% TRIGGER trg_test03_2
AFTER INSERT ON T_PCM_DEP_FIXED
FOR EACH ROW
BEGIN
-- 是否持有定期
IF EXISTS(SELECT CUST_ID FROM T_PCM_PROD_OWN WHERE CUST_ID = NEW.CUST_ID) THEN
UPDATE T_PCM_PROD_OWN
SET IS_FIXED_DEP = '1'
WHERE CUST_ID = NEW.CUST_ID;
ELSE
UPDATE T_PCM_PROD_OWN
SET IS_FIXED_DEP = '0'
WHERE CUST_ID = NEW.CUST_ID;
END IF;
END;
CREATE DEFINER=root@% TRIGGER trg_test03_3
AFTER INSERT ON T_PCM_LOAN
FOR EACH ROW
BEGIN
-- 是否持有贷款
IF EXISTS(SELECT CUST_ID FROM T_PCM_PROD_OWN WHERE CUST_ID = NEW.CUST_ID) THEN
UPDATE T_PCM_PROD_OWN
SET IS_LOAN = '1'
WHERE CUST_ID = NEW.CUST_ID;
ELSE
UPDATE T_PCM_PROD_OWN
SET IS_LOAN = '0'
WHERE CUST_ID = NEW.CUST_ID;
END IF;
END;
CREATE DEFINER=root@% TRIGGER trg_test03_4
AFTER INSERT ON T_PCM_WEALTH
FOR EACH ROW
BEGIN
-- 是否持有理财
IF EXISTS(SELECT CUST_ID FROM T_PCM_PROD_OWN WHERE CUST_ID = NEW.CUST_ID) THEN
UPDATE T_PCM_PROD_OWN
SET IS_WEALTH = '1'
WHERE CUST_ID = NEW.CUST_ID;
ELSE
UPDATE T_PCM_PROD_OWN
SET IS_WEALTH = '0'
WHERE CUST_ID = NEW.CUST_ID;
END IF;
END;
```
请注意,每个表都有一个单独的触发器,以确保在插入新数据时更新相应的列。触发器将根据新插入的数据的CUST_ID值来更新t_pcm_prod_own表中的相关列。
SELECT sum(x.offline = 1) AS deviceoffline , sum(x.offline = 0) AS deviceonline FROM ( SELECT id AS devicecount , TIMESTAMPDIFF(HOUR, `update`, NOW()) > 3 AS offline , uuid FROM `laim_data`.`usedevice` ) x WHERE x.uuid IN ( SELECT uuid FROM `laim_data`.`usedevice` d WHERE d.city IN ( SELECT areacode FROM `laim_data`.`user_area` WHERE user_code = 'test' ) );进行优化
这个SELECT语句可以进行如下优化:
1. 将子查询中的uuid列表提前查询出来,然后在主查询中使用IN语句代替子查询,可以避免重复查询。
2. 将TIMESTAMPDIFF函数中的NOW()提前查询出来,可以避免在每个记录中都重复计算当前时间。
优化后的SQL语句如下:
```
SELECT
SUM(x.offline = 1) AS deviceoffline,
SUM(x.offline = 0) AS deviceonline
FROM (
SELECT
id AS devicecount,
(TIMESTAMPDIFF(HOUR, `update`, now()) > 3) AS offline,
uuid
FROM `laim_data`.`usedevice`
WHERE uuid IN (
SELECT uuid
FROM `laim_data`.`usedevice` d
WHERE d.city IN (
SELECT areacode
FROM `laim_data`.`user_area`
WHERE user_code = 'test'
)
)
) x;
```
这样就可以减少重复查询,提高查询效率。
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