mysql相关内容

文章目录
  1. 1. 编码集
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SHOW DATABASES                                //列出 MySQL Server 数据库。
SHOW TABLES [FROM db_name] //列出数据库数据表。
SHOW CREATE TABLES tbl_name //导出数据表结构。
SHOW TABLE STATUS [FROM db_name] //列出数据表及表状态信息。
SHOW COLUMNS FROM tbl_name [FROM db_name] //列出资料表字段
SHOW FIELDS FROM tbl_name [FROM db_name],DESCRIBE tbl_name [col_name]。
SHOW FULL COLUMNS FROM tbl_name [FROM db_name]//列出字段及详情
SHOW FULL FIELDS FROM tbl_name [FROM db_name] //列出字段完整属性
SHOW INDEX FROM tbl_name [FROM db_name] //列出表索引。
SHOW STATUS //列出 DB Server 状态。
SHOW VARIABLES //列出 MySQL 系统环境变量。
SHOW PROCESSLIST //列出执行命令。
SHOW GRANTS FOR user //列出某用户权限

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SHOW DATABASES
SHOW TABLES FROM DB_NAME

SHOW COLUMNS FROM
select * from information_schema.columns where table_schema='DB_NAME'

select table_name,column_name,collation_name,character_set_name from information_schema.columns where table_schema='DB_NAME'
select table_name,column_name,column_name,collation_name,character_set_name from information_schema.columns where table_schema='DB_NAME' and column_name like '%description'
select * from information_schema.columns where table_schema='DB_NAME' and column_name like '%description'


select table_name,column_name,collation_name,character_set_name from information_schema.columns where table_schema='DB_NAME' and COLUMN_NAME like '%a%'

查询逻辑和相关

编码集