Breaking News: Grepper is joining You.com. Read the official announcement!

how to truncate foreign key constraint table

Add Answer

Johan Leabirt answered on October 1, 2020 Popularity 9/10 Helpfulness 4/10

answer how to truncate foreign key constraint table

related how to truncate table with foreign key constraint

related truncate table sql server foreign key

how to truncate foreign key constraint table

Comment

DELETE FROM [TableName]
DBCC CHECKIDENT ([TableName], RESEED, 0)

Popularity 9/10 Helpfulness 4/10 Language sql

Source: stackoverflow.com

Tags: key sql truncate

Link to this answer
Share Copy Link

Contributed on Jun 06 2021

Johan Leabirt

0 Answers Avg Quality 2/10

Closely Related Answers

how to truncate table with foreign key constraint

Comment

SET FOREIGN_KEY_CHECKS = 0;
TRUNCATE table1;

Popularity 10/10 Helpfulness 10/10 Language sql

Source: Grepper

Tags: key

Link to this answer
Share Copy Link

Contributed on Oct 01 2020

Ill Ibis

0 Answers Avg Quality 2/10

truncate table sql server foreign key

Comment

CREATE TABLE #x -- feel free to use a permanent table
(
  drop_script NVARCHAR(MAX),
  create_script NVARCHAR(MAX)
);

DECLARE @drop   NVARCHAR(MAX) = N'',
        @create NVARCHAR(MAX) = N'';

-- drop is easy, just build a simple concatenated list from sys.foreign_keys:
SELECT @drop += N'
ALTER TABLE ' + QUOTENAME(cs.name) + '.' + QUOTENAME(ct.name) 
    + ' DROP CONSTRAINT ' + QUOTENAME(fk.name) + ';'
FROM sys.foreign_keys AS fk
INNER JOIN sys.tables AS ct
  ON fk.parent_object_id = ct.[object_id]
INNER JOIN sys.schemas AS cs 
  ON ct.[schema_id] = cs.[schema_id];

INSERT #x(drop_script) SELECT @drop;

-- create is a little more complex. We need to generate the list of 
-- columns on both sides of the constraint, even though in most cases
-- there is only one column.
SELECT @create += N'
ALTER TABLE ' 
   + QUOTENAME(cs.name) + '.' + QUOTENAME(ct.name) 
   + ' ADD CONSTRAINT ' + QUOTENAME(fk.name) 
   + ' FOREIGN KEY (' + STUFF((SELECT ',' + QUOTENAME(c.name)
   -- get all the columns in the constraint table
    FROM sys.columns AS c 
    INNER JOIN sys.foreign_key_columns AS fkc 
    ON fkc.parent_column_id = c.column_id
    AND fkc.parent_object_id = c.[object_id]
    WHERE fkc.constraint_object_id = fk.[object_id]
    ORDER BY fkc.constraint_column_id 
    FOR XML PATH(N''), TYPE).value(N'.[1]', N'nvarchar(max)'), 1, 1, N'')
  + ') REFERENCES ' + QUOTENAME(rs.name) + '.' + QUOTENAME(rt.name)
  + '(' + STUFF((SELECT ',' + QUOTENAME(c.name)
   -- get all the referenced columns
    FROM sys.columns AS c 
    INNER JOIN sys.foreign_key_columns AS fkc 
    ON fkc.referenced_column_id = c.column_id
    AND fkc.referenced_object_id = c.[object_id]
    WHERE fkc.constraint_object_id = fk.[object_id]
    ORDER BY fkc.constraint_column_id 
    FOR XML PATH(N''), TYPE).value(N'.[1]', N'nvarchar(max)'), 1, 1, N'') + ');'
FROM sys.foreign_keys AS fk
INNER JOIN sys.tables AS rt -- referenced table
  ON fk.referenced_object_id = rt.[object_id]
INNER JOIN sys.schemas AS rs 
  ON rt.[schema_id] = rs.[schema_id]
INNER JOIN sys.tables AS ct -- constraint table
  ON fk.parent_object_id = ct.[object_id]
INNER JOIN sys.schemas AS cs 
  ON ct.[schema_id] = cs.[schema_id]
WHERE rt.is_ms_shipped = 0 AND ct.is_ms_shipped = 0;

UPDATE #x SET create_script = @create;

PRINT @drop;
PRINT @create;

/*
EXEC sp_executesql @drop
-- clear out data etc. here
EXEC sp_executesql @create;
*/

Popularity 9/10 Helpfulness 2/10 Language sql

Source: stackoverflow.com

Tags: key

Link to this answer
Share Copy Link

Contributed on Dec 03 2021

Wrong Willet

0 Answers Avg Quality 2/10

how to truncate foreign key constraint table

Contents

More Related Answers

how to truncate foreign key constraint table

Closely Related Answers

how to truncate table with foreign key constraint

truncate table sql server foreign key

Grepper

Documentation

Social

Legal

Contact

Oops, You will need to install Grepper and log-in to perform this action.