Cómo cambiar el nombre de la restricción de clave principal para varias tablas en la base de datos de SQL Server - Tutorial de SQL Server / TSQL, parte 64

Escenario:

Solución:

USE YourDatabaseName
GO
--Declare Variables
DECLARE @DatabaseName AS VARCHAR(128)
DECLARE @SchemaName AS VARCHAR(128)
DECLARE @TableName AS VARCHAR(128)
DECLARE @ColumnName AS VARCHAR(128)
DECLARE @ConstraintName AS VARCHAr(128)

DECLARE CUR CURSOR
FOR
--Get Primary Key Constraint
Select
   TC.Table_Catalog as DatabaseName,
   TC.Table_Schema AS TableSchema,
   TC.Table_Name AS TableName,
   CCU.Column_Name AS ColumnName,
   TC.Constraint_Name AS ConstraintName
  From
   information_Schema.Table_Constraints TC  
INNER JOIN
   Information_Schema.constraint_column_usage CCU  
      on TC.Constraint_Name=CCU.Constraint_Name  
      and TC.Table_Name=CCU.Table_Name  
where
   Constraint_Type='PRIMARY KEY'
--Change your criteria as per your naming convention 
   and 'Pk_'+TC.Table_Schema+'_'+TC.Table_Name
   +'_'+CCU.Column_Name<>TC.Constraint_Name
OPEN Cur
FETCH NEXT
FROM Cur
INTO @DatabaseName,@SchemaName,@TableName,@ColumnName,

@ConstraintName
WHILE @@FETCH_STATUS = 0
BEGIN
    --Build dynamic sql for each database 
    DECLARE @SQL VARCHAR(MAX) = NULL
   SET @SQL ='sp_rename '+Char(10)
   SET @SQL+='@objname ='''+@SchemaName+'.'+@ConstraintName+''',' 
   SET @SQL+='@newname='''+'Pk_'+@SchemaName
   SET @SQL+='_'+@TableName+'_'+@ColumnName+''','
   SET @SQL+='@objtype = ''object'''
    --EXEC (@SQL)
    PRINT @SQL
    FETCH NEXT
    FROM Cur
    INTO @DatabaseName,@SchemaName,@TableName,@ColumnName,

@ConstraintName
END
CLOSE Cur
DEALLOCATE Cur