UPDATE tablea a 代码语言:txt AI代码解释 SET a.fieldforupdate = (SELECT b.fieldsource FROM tableb b WHERE a.keyfield = b.keyfield) 代码语言:txt AI代码解释 WHERE EXISTS (SELECT b.fieldsource FROM tableb b WHERE a.keyfield = b.keyfield); 有三点需要注意:1. 对于一个给定的a.keyfield...
update a set value = 'test' from a join b on a.b_id = b.id join c on b.c_id = c.id where a.key = 'test' and c.value = 'test'; 按照上边的sql,本意是a、b、c三表关联,当c的value是’test’且a的key也是’test’的时候,就将a的value也改为’test’。但实际上这个sql有大问题,...
1. 对于一个给定的a.keyfield的值,SELECT b.fieldsource FROM tableb b WHERE a.keyfield = b.keyfield 的值只能是一个唯一值,不能是多值。 2. 在绝大多数情况下,最后面的where EXISTS子句是重要的,否则将得到错误的结果。 3. 对于视图更新的限制: 如果视图基于多个表的连接,那么用户更新(update)视图记...
"Referring to Objects in Remote Databases" for more information on referring to database links "Distributed Queries" for more information about distributed queries and "Using Distributed Queries: Example"If you omit dblink, then Oracle assumes that the table, view, or materialized view is on the ...
These patches address vulnerabilities in Oracle code and in third party components included in Oracle products. These patches are usually cumulative, but each advisory describes only the security patches added since the previous Critical Patch Update Advisory. Thus, prior Critical Patch Update advisories...
These patches address vulnerabilities in Oracle code and in third-party components included in Oracle products. These patches are usually cumulative, but each advisory describes only the security patches added since the previous Critical Patch Update Advisory. Thus, prior Critical Patch Update advisories...
Therefore, semi-consistent read is instead implemented in multi-table UPDATE, in this WL. "Single code path for multi-table and single-table UPDATE (DELETE)" is a bigger-size change which could be a follow-up, later. Copyright (c) 2000, 2025, Oracle Corporation and/or its affiliates. ...
报错信息如下: [Code: 1093, SQL State: HY000] You can’t specify target table ‘bd_bankaccbas’ for update in FROM clause 译文: 不能在 FROM 子句中指定目标表 ‘bd_bankaccbas’ 进行更新。 有问题的 SQL 语句如下,它在 oracle 数据库的语法是支持的,但是 mysql 就不支持直接这么写: from 和upd...
在执行 mysql 语句时,出现1093 - You can't specify target table 'daily_job' for update in FROM clause这个错误。 二、错误原因 出现1093 - You can't specify target table 'daily_job' for update in FROM clause这个错误,它表面的意思是不能在同一个sql语句中,先select同一个表的某些值,然后再update...
Flink 本身不支持直接写入 Greenplum 6,但你可以使用 Flink 的 Table API 和 SQL 语句来实现。首先,你需要将 Greenplum 6 作为外部表添加到 Flink 中,然后使用 SQL 语句进行插入操作。 关于你提到的ON CONFLICT (uuid) DO UPDATE SET语法问题,这可能是因为你使用的 PostgreSQL 版本不支持这种语法。你可以尝试使用...