Date: January 24, 2005 04:33PM I thought I read somewhere that it was possible to pull up a list of all tables that had a common column. I.E. find all tables with the column 'order_id'. Having a hard time finding it in MySQL docs and google. Anybody have any ideas?
This tutorial shows how to find all tables in MySQL with specific column names, but before that, it is essential to understand the schema (database) where these tables are stored. So let’s start with that.Schema in MySQLA database/schema specifies the logical restrictions, including table ...
If no table is given, then all matching tables in database are shown. If no column is given, then all matching columns and column types in table are shown. Default options are read from the following files in the given order: /etc/my.cnf /etc/mysql/my.cnf /usr/local/etc/my.cnf ~...
1 row in set (0.00 sec) 4:查看当前数据库大小 例如,我要查看INVOICE数据库的大小,那么可以通过下面SQL查看 mysql> use information_schema Reading table information for completion of table and column names You can turn off this feature to get a quicker startup with -A Database changed mysql> sele...
count(*) FROM tbl_task WHERE task_start_time < date_sub(current_date, INTERVAL 1 DAY)...UNION ALLSELECT count(*) FROM tbl_task WHERE task_start_time < date_sub(current_date, INTERVAL 9 DAY); Edit: 您还可以加入一个派生表,该表使用FROM-lessSELECTs和UNION ALL来获取回顾的天数,然后进行...
1.我给你留一个问题吧,如果表T中没有字段k,而你执行了这个语句 select * from T where k=1, 那肯定是会报“不存在这个列”的错误: “Unknown column ‘k’ in ‘where clause’”。你觉得这个错误是在我们上面提到的哪个阶段报出来的呢? 分析器,分析器中判断语句是否正确,表是否存在,列是否存在。
UPDATE performance_schema.setup_instruments SET ENABLED= 'NO' WHERE NAME = 'memory/sql/dd::column_statistics'; UPDATE performance_schema.setup_instruments SET ENABLED= 'NO' WHERE NAME = 'memory/sql/dd::default_values'; UPDATE performance_schema.setup_instruments SET ENABLED= 'NO' WHERE NAME =...
修复部分子查询上拉而导致警告column in group statement is ambiguous的问题。 8.0.2.2.22.1 类别 说明 发布时间 新增功能和性能优化 优化了将冷数据从OSS导回至InnoDB引擎的报错信息内容。 支持在SQL Trace中配置跟踪慢查询的执行信息。 2024-04-17 问题修复 修复Statement Outline和Concurrency Control等功能在执行Re...
extent_space is available for storing on-disk column data from the fish table only; for this reason, it is not visible when selecting from the Information Schema FILES table. For fully replicated tables, ndbdesc shows only the nodes holding primary partition fragment replicas; nodes with ...
· 错误:1121 SQLSTATE: 42000 (ER_NULL_COLUMN_IN_INDEX) 消息:列'%s'与UNIQUE或INDEX一起使用,但未定义为NOT NULL。 · 错误:1122 SQLSTATE: HY000 (ER_CANT_FIND_UDF) 消息:无法加载函数'%s'。 · 错误:1123 SQLSTATE: HY000 (ER_CANT_INITIALIZE_UDF) 消息:无法初始化函数'%s'; %s · 错误:1124...