how to delete all data from tables sql code example

Example 1: sql delete where in

-- Deletes all records where `columnName` matches the values in brackets.
DELETE FROM tableName WHERE columnName IN ('val1', 'val2', 'val3');

Example 2: sql delete all values in a column

UPDATE TableName SET ColumnName = NULL

Example 3: SQL Query to delete all the tables in a database

BY LOVE

EXEC sp_msforeachtable "ALTER TABLE ? NOCHECK CONSTRAINT all"
DECLARE @sql NVARCHAR(max)=''

SELECT @sql += ' Drop table ' + QUOTENAME(TABLE_SCHEMA) + '.'+ QUOTENAME(TABLE_NAME) + '; '
FROM   INFORMATION_SCHEMA.TABLES
WHERE  TABLE_TYPE = 'BASE TABLE'
Exec Sp_executesql @sql

Example 4: delete all records from table except sql

delete from yourTableName where yourColumnName NOT
IN(‘yourValue1’,‘yourValue2’,‘yourValue3’,.........N);

Tags:

Misc Example

Related