如何按数据类型选择列名

Question

如何获取表中具有特定类型（例如日期时间）的所有列的名称？

更好 - 我怎样才能做同样的事情，但将多个表连接在一起，然后列出列名及其来自的表？

Answer 1

查询sys.columns并sys.types像这样：

select object_name(c.object_id) TableName, * 
FROM sys.columns c
join sys.types t ON c.system_type_id = t.system_type_id
where t.name = 'datetime'

Answer 2

如何获取表中特定类型（例如日期时间）的所有列的名称？

（输出为schema_name | table_name | column_name | data_type）：

SELECT Object_Schema_name(c.object_id) as [SCHEMA_NAME]
    ,object_NAME(c.object_id) AS TABLE_NAME
    ,c.NAME AS COLUMN_NAME
    ,t.NAME AS DATA_TYPE
    -- add / remove columns as per need
    --,c.max_length AS MAX_LENGTH
FROM sys.all_columns c
INNER JOIN sys.types t ON t.system_type_id = c.system_type_id
where Object_Schema_name(c.object_id) <> 'sys' -- not sys schema
    -- filters 
        and t.name = 'Datetime'
    --  and object_NAME(c.object_id) = 'someTableName'