Nhận danh sách các bảng có hoặc không có Ràng buộc khóa chính trong tất cả Cơ sở dữ liệu từ Phiên bản SQL Server - Hướng dẫn SQL Server / TSQL Phần 61

Tình huống:

Giải pháp:

USE master
GO

--Declare Variables
DECLARE @DatabaseName AS VARCHAR(500)

--Create Temp Table to Save Results
IF OBJECT_ID('tempdb..#Results') IS NOT NULL
    DROP TABLE #Results

CREATE TABLE #Results (
    ServerName VARCHAR(128)
    ,DatabaseName VARCHAR(128)
    ,SchemaName VARCHAR(128)
    ,TableName VARCHAR(128)
    ,ColumnName VARCHAR(128)
    ,ConstraintName VARCHAR(128)
    ,HasPrimaryKeyConstraint VARCHAR(10)
    )

DECLARE CUR CURSOR
FOR
SELECT '[' + NAME + ']' AS DBName
FROM sys.databases
WHERE NAME NOT IN (
        'master'
        ,'tempdb'
        ,'model'
        ,'msdb'
        )

OPEN Cur

FETCH NEXT
FROM Cur
INTO @DatabaseName

WHILE @@FETCH_STATUS = 0
BEGIN
    --Build dynamic sql for each database 
    DECLARE @SQL VARCHAR(MAX) = NULL

    SET @SQL = 'Insert into #Results
      Select
      @@ServerName,
   T.Table_Catalog as DatabaseName,
   T.Table_Schema AS TableSchema,
   T.Table_Name AS TableName,
   CCU.Column_Name AS ColumnName,
   TC.Constraint_Name AS ConstraintName,
   Case When  TC.Constraint_Name is not Null Then ''Yes''
   Else ''No'' End as HasPrimaryKeyConstraint
From
' + @DatabaseName + '.information_schema.tables T
left join 

   ' + @DatabaseName + '.information_Schema.Table_Constraints TC 
   on T.Table_Catalog=TC.Table_Catalog
   and T.Table_Schema=TC.Table_Schema
   and T.Table_Name=TC.Table_Name
   and TC.Constraint_Type=''PRIMARY KEY''
   
left JOIN
   ' + @DatabaseName + 

'.Information_Schema.constraint_column_usage CCU  
      on TC.Constraint_Name=CCU.Constraint_Name  
      and TC.Table_Name=CCU.Table_Name
      and T.Table_Type=''BASE TABLE'''

    EXEC (@SQL)

    PRINT @SQL

    FETCH NEXT
    FROM Cur
    INTO @DatabaseName
END

CLOSE Cur

DEALLOCATE Cur

--Select all records from temp table 
SELECT *
FROM #Results