sql语句
SELECT
COLUMN_NAME 列名,
COLUMN_TYPE 数据类型,
DATA_TYPE 字段类型,
CHARACTER_MAXIMUM_LENGTH 长度,
IS_NULLABLE 是否为空,
COLUMN_DEFAULT 默认值,
COLUMN_COMMENT 备注
FROM
INFORMATION_SCHEMA.COLUMNS
WHERE table_schema='xxx' //你的数据库名字
and table_name = 'xxx' //你的表名字
举个栗子:
SELECT
COLUMN_NAME 列名,
COLUMN_TYPE 数据类型,
DATA_TYPE 字段类型,
CHARACTER_MAXIMUM_LENGTH 长度,
IS_NULLABLE 是否为空,
COLUMN_DEFAULT 默认值,
COLUMN_COMMENT 备注
FROM
INFORMATION_SCHEMA.COLUMNS
WHERE table_schema='ljptx'
and table_name = 'pb_resident'
备注按逗号分隔拆分
SELECT
COLUMN_COMMENT 备注,
SUBSTRING_INDEX(COLUMN_COMMENT, ',', 1) AS '名称',
SUBSTRING_INDEX(SUBSTRING_INDEX(COLUMN_COMMENT, ',', 2), ',', -1) AS '是否显示',
SUBSTRING_INDEX(SUBSTRING_INDEX(COLUMN_COMMENT, ',', 3), ',', -1) AS '注释'
FROM
INFORMATION_SCHEMA.COLUMNS
WHERE table_schema='ljptx'
and table_name = 'pb_resident'
and COLUMN_NAME='person_code'
SUBSTRING_INDEX用法:
SUBSTRING_INDEX(‘str’,‘obj’,‘num’)
str:要分隔的字符串
obj:以什么内容作为分隔符
num:分隔的长度,正数,从左向右分隔的长度的内容,负数,从右向左分隔的长度的内容