搜索数据库中的列

Question

假设我有一个数据库

My_DB

，有数百张表。

现在，我需要在数据库中查找特定列

My_Emp_ID

。

我尝试手动搜索每个表，但效率不高。

查找包含列

My_Emp_ID

的所有表的最佳方法是什么？

您可以假设

schema

对于数据库中存在的所有表都是相同的。

谢谢。

Answer 1

--这样就可以了
使用 AdventureWorks2019

  IF OBJECT_ID('tempdb..#Results') IS NOT NULL DROP TABLE #Results
    CREATE TABLE #Results (ColumnName nvarchar(370), ColumnValue nvarchar(3630))
    SET NOCOUNT ON
    DECLARE @TableName nvarchar(256), @ColumnName nvarchar(128), @SearchStr2 nvarchar(110),@SearchStr  nvarchar(128)
  
  SET @SearchStr ='Column name' ---- Type what you want to search for between the single quote
    SET  @TableName = ''
    SET @SearchStr2 = QUOTENAME('%' + @SearchStr + '%','''')  
    WHILE @TableName IS NOT NULL
    BEGIN
        SET @ColumnName = ''
        SET @TableName = 
        (  SELECT MIN(QUOTENAME(TABLE_SCHEMA) + '.' + QUOTENAME(TABLE_NAME))
            FROM     INFORMATION_SCHEMA.TABLES
            WHERE         TABLE_TYPE = 'BASE TABLE'
                AND    QUOTENAME(TABLE_SCHEMA) + '.' + QUOTENAME(TABLE_NAME) > @TableName
                AND    OBJECTPROPERTY(
                        OBJECT_ID(
                            QUOTENAME(TABLE_SCHEMA) + '.' + QUOTENAME(TABLE_NAME)
                             ), 'IsMSShipped'
                               ) = 0
        )
        WHILE (@TableName IS NOT NULL) AND (@ColumnName IS NOT NULL)
        BEGIN
            SET @ColumnName =
            (  SELECT MIN(QUOTENAME(COLUMN_NAME))
                FROM     INFORMATION_SCHEMA.COLUMNS
                WHERE         TABLE_SCHEMA    = PARSENAME(@TableName, 2)
                    AND    TABLE_NAME    = PARSENAME(@TableName, 1)
                    AND    DATA_TYPE IN ('char', 'varchar', 'nchar', 'nvarchar', 'int', 'decimal')
                    AND    QUOTENAME(COLUMN_NAME) > @ColumnName
            )
IF @ColumnName IS NOT NULL
            BEGIN INSERT INTO #Results
                EXEC
                ( 'SELECT ''' + @TableName + '.' + @ColumnName + ''', LEFT(' + @ColumnName + ', 3630) 
                    FROM ' + @TableName + 'WITH (NOLOCK) ' +
                    ' WHERE ' + @ColumnName + ' LIKE ' + @SearchStr2
                ) END  END  END

    SELECT DISTINCT
  ColumnName AS [Schema, Table and Column Name],
  ColumnValue 
  FROM #Results

Answer 2

select * 
from INFORMATION_SCHEMA.COLUMNS
where COLUMN_NAME = 'My_Emp_ID'

Answer 3

来自 MS Server 文档：

您也可以直接查询系统目录视图来查询有关表、模式和列的对象元数据信息。例如：

SELECT s.name as schema_name, t.name as table_name, c.* FROM sys.columns AS c
INNER JOIN sys.tables AS t ON t.object_id = c.object_id
INNER JOIN sys.schemas AS s ON s.schema_id = t.schema_id
WHERE t.name = 'mytable' AND s.name = 'dbo';

另外按列名称过滤结果