MySQL 工具sql

查询所有字段，根据库名获取所有的字段信息

SELECT
    TABLE_SCHEMA AS '库名',
    TABLE_NAME AS '表名',
    COLUMN_NAME AS '列名',
    ORDINAL_POSITION AS '列的排列顺序',
    COLUMN_DEFAULT AS '默认值',
    IS_NULLABLE AS '是否为空',
    DATA_TYPE AS '数据类型',
    CHARACTER_MAXIMUM_LENGTH AS '字符最大长度',
    NUMERIC_PRECISION AS '数值精度(最大位数)',
    NUMERIC_SCALE AS '小数精度',
    COLUMN_TYPE AS 列类型,
    COLUMN_KEY 'KEY',
    EXTRA AS '额外说明',
    COLUMN_COMMENT AS '注释'
FROM
    information_schema.`COLUMNS`
WHERE
    TABLE_SCHEMA = 'fssuat'
ORDER BY
    table_name,
    ordinal_position;

 

-- 查看数据库中所有表的记录数

use information_schema;
SELECT
    table_name,
    table_rows 
FROM TABLES 
WHERE TABLE_SCHEMA='fssuat' 
ORDER BY table_rows DESC;

 

 

SELECT
    t.TABLE_NAME AS '表名',
    t.TABLE_COMMENT AS '表注释',
    c.COLUMN_NAME AS '列名',
    c.COLUMN_COMMENT AS '列注释',
    c.DATA_TYPE AS '数据类型',
    c.CHARACTER_MAXIMUM_LENGTH AS '字符最大长度'
FROM
    information_schema.`TABLES` t
JOIN information_schema.`COLUMNS` c ON t.TABLE_NAME = c.TABLE_NAME
WHERE
    t.TABLE_SCHEMA = 'test'

 

 

参考：

查询mysql所有表数据、字段信息