[Error Code: 1093, SQL State: HY000] You can't specify target table 'tab1' for update in FROM clause Subject Written By Posted Update with self join fabio santoro April 03, 2008 07:12AM Re: Update with self join Peter Brawley
UPDATE orders o JOIN customers c ON o.customer_id = c.id SET o.status = c.status WHERE o.id BETWEEN 1 AND 1000; 示例代码 假设我们有两个表orders和customers,结构如下: 代码语言:txt 复制 CREATE TABLE customers ( id INT PRIMARY KEY, status VARCHAR(20) ); CREATE TABLE orders ( id INT ...
语法:alter table 表名 modify 字段名 类型; 4、添加字段 alter table 表名 add 字段名 类型; (1)添加日期字段:datetime alter table 表名 add 字段名 datetime; 向日期字段中写入信息 通过now()获取当前时间 (2)enum字段 alter table 表名 add 字段名 enum('F', 'M'); (F和M是固定值,自己可以设置)...
从SQL转换UPDATE与INNER JOIN以在MySQL中使用。 在MySQL中,您可以使用UPDATE语句与INNER JOIN来同时更新两个或多个表中的数据。以下是一个示例,说明如何将表A中的数据与表B中的数据进行连接,并根据连接条件更新表A中的数据。 代码语言:sql 复制 UPDATE tableA AS a INNER JOIN tableB AS b ON a.c...
UPDATE JOIN语句的基本语法如下 UPDATEtable1 T1JOINtable2 T2ONT1.column1=T2.column2SETT1.column2=T2.column3WHERET1.column1isnotnull; 1. 2. 3. 4. 示例 比如我们有一张用户user表,有一张bussness表,以前我们只记录了创建人,现在我们需要将创建人的姓名也加上,我们可以使用以下sql来更新: ...
INSERT INTO table (column_list) VALUES (value_list) [SELECT ...FROM ... WHERE] ON DUPLICATE KEY UPDATE c1 = v1, c2 = v2, ...; UPDATE JOIN syntax(联表更新数据)UPDATE T1, T2, [INNER JOIN | LEFT JOIN] T1 ON T1.C1 = T2. C1 SET T1.C2 = T2.C2, T2.C3 = expr WHERE ...
UPDATEtable1, [table2,] [INNERJOIN|LEFTJOIN] table1ONtable1.col = table2.colSETtable1.col = valWHEREconditionCode language:SQL (Structured Query Language)(sql) Here, Table1 is the main table and table2 is the table that you want to join with table1. Note that, you must specify at...
mysql多表join时候update更新数据的⽅法 sql语句：复制代码代码如下:update item i,resource_library r,resource_review_link l set i.name=CONCAT('Review:',r.resource_name) where i.item_id=l.instance_id and l.level='item' and r.resource_id=l.resource_id and i.name=''JOIN UPDATE & JOIN ...
JOIN UPDATE & JOIN DELETE 复制代码代码如下: update a set a.schoolname = b.schoolname from tb_Std as a join tb_Sch as b on a.School = b.School where a.std_year = 2005 go /* (2 row(s) affected) */ select * from tb_Std as a join tb_Sch as b on a.School = b.School ...
Re: Update a table with a union Peter Brawley May 14, 2019 09:05AM Re: Update a table with a union Thomas Stieve May 14, 2019 11:26AM Re: Update a table with a union Peter Brawley May 14, 2019 02:36PM Re: Update a table with a union ...