如何检查数据库中所有表中的列名

Question

我试图写一个查询，我可以检查数据库中的所有表中是否存在某些列名。为了避免困难，我试图一次访问所有表并检查表中是否存在列。我能够找到下面的代码来获取表名：

SELECT TABLE_NAME
FROM INFORMATION_SCHEMA.TABLES
WHERE TABLE_TYPE = 'BASE TABLE' AND TABLE_CATALOG='SAMPLE_DB_NAME'  

我无法进入每个表并检查列名称。

如果任何人可以帮助我查询进入每个表并检查所有表的常量列名称。

Answer 1

试试这个

SELECT  TABLE_CATALOG,
        TABLE_NAME,
        COLUMN_NAME
FROM INFORMATION_SCHEMA.COLUMNS
WHERE  TABLE_CATALOG='SAMPLE_DB_NAME' 
AND CHARINDEX('Status',COLUMN_NAME) = 1 -- Specify the column name to check the column is existed
                                        --- in the datbase of all available tables 

Answer 2

--List of tables
SELECT * FROM sys.tables

--List of Columns
SELECT * FROM sys.columns

--List of Columns Tables joined
SELECT tbl.[name] AS TableName, clm.[name] AS ColumnName FROM sys.tables as tbl INNER JOIN sys.columns as clm ON tbl.[object_id] = clm.[object_id]



-You can check with the column name if the column exist in all tables 
USE MyDataBase
DECLARE @TableCount INT
DECLARE @FoundTables INT
SET @TableCount = ( SELECT COUNT(*) FROM sys.tables)
SET @FoundTables = ( SELECT COUNT(DISTINCT(tbl.[name])) AS NumberOfTables FROM sys.tables as tbl INNER JOIN sys.columns as clm ON tbl.[object_id] = clm.[object_id] WHERE clm.[name] = 'YourColumnName')

IF @FoundTables = @TableCount
 BEGIN
   PRINT 'The column is present in all tables'
 END
ELSE
 BEGIN 
   PRINT 'The column is not present in all tables'
 END

Answer 3

使用此查询，您可以获取所有表中的所有列

WITH DistinctColumnNames AS (
    SELECT DISTINCT Column_Name 
    FROM INFORMATION_SCHEMA.COLUMNS C
    JOIN INFORMATION_SCHEMA.TABLES T ON C.TABLE_SCHEMA = T.TABLE_SCHEMA AND C.TABLE_NAME = T.TABLE_NAME AND C.TABLE_CATALOG = T.TABLE_CATALOG
    WHERE T.TABLE_TYPE = 'BASE TABLE' AND T.TABLE_CATALOG='SAMPLE_DB_NAME' AND T.TABLE_SCHEMA = 'dbo' AND T.TABLE_NAME NOT LIKE 'sys%'
)
SELECT COLUMN_NAME
FROM DistinctColumnNames DC
WHERE NOT EXISTS (
    SELECT 1 
    FROM INFORMATION_SCHEMA.TABLES T
    WHERE T.TABLE_TYPE = 'BASE TABLE' AND T.TABLE_CATALOG='SAMPLE_DB_NAME' AND T.TABLE_SCHEMA = 'dbo' AND T.TABLE_NAME NOT LIKE 'sys%'
    AND NOT EXISTS(SELECT 1 FROM INFORMATION_SCHEMA.COLUMNS C
        WHERE C.TABLE_NAME = T.TABLE_NAME AND C.COLUMN_NAME = DC.COLUMN_NAME
         AND T.TABLE_CATALOG='SAMPLE_DB_NAME' AND T.TABLE_SCHEMA = 'dbo')
)

Answer 4

以下查询将列出所有不存在任何给定特定字段的表名。

SELECT distinct TABLE_NAME
FROM INFORMATION_SCHEMA.TABLES
WHERE  TABLE_CATALOG='testdb' 
and TABLE_NAME not in(
select object_name(object_id) ObjectName from sys.COLUMNS where name  in ('YourfieldName1', 'YourfieldName2')

以下查询将列出将找到指定字段的所有表名。

select object_name(object_id) ObjectName, * 
from sys.COLUMNS where name  in ('YourfieldName1', 'YourfieldName2')