MS SQL 讀取資料表中，欄位設定的相關資訊

原文

讀取資料表中，欄位設定的相關資訊(欄位名稱,資料型別,最大長度,欄位備註...)

SELECT 

a.TABLE_NAME as 表格名稱, 

b.COLUMN_NAME as 欄位名稱, 

b.DATA_TYPE as 資料型別, 

b.CHARACTER_MAXIMUM_LENGTH as 最大長度, 

b.COLUMN_DEFAULT as 預設值, 

b.IS_NULLABLE as 允許空值, 

( SELECT value FROM fn_listextendedproperty (NULL, 'schema', 'dbo', 'table', a.TABLE_NAME, 'column', default) WHERE name='MS_Description' and objtype='COLUMN' and objname Collate Chinese_Taiwan_Stroke_CI_AS = b.COLUMN_NAME ) as 欄位描述 

FROM INFORMATION_SCHEMA.TABLES a 

LEFT JOIN INFORMATION_SCHEMA.COLUMNS b ON ( a.TABLE_NAME=b.TABLE_NAME ) 

WHERE TABLE_TYPE='BASE TABLE' 

AND 

--列出特定表  

a.TABLE_NAME ='' 

AND

  --列出所有資料表  

a.TABLE_NAME in (SELECT TABLE_NAME FROM INFORMATION_SCHEMA.TABLES) 

ORDER BY a.TABLE_NAME, ordinal_position

Example.

select b.CHARACTER_MAXIMUM_LENGTH from INFORMATION_SCHEMA.TABLES a 

left join INFORMATION_SCHEMA.COLUMNS b ON (a.TABLE_NAME=b.TABLE_NAME) where TABLE_TYPE='BASE TABLE' and a.TABLE_NAME='ABC' and b.COLUMN_NAME='Test' order by a.TABLE_NAME, ordinal_position