写一段 etl的存储过程

CREATE PROCEDURE etl_process AS
BEGIN
-- Declare variables
DECLARE @source_table_name VARCHAR(100)
DECLARE @destination_table_name VARCHAR(100)
DECLARE @sql VARCHAR(MAX)

-- Set source and destination table names
SET @source_table_name = 'source_table'
SET @destination_table_name = 'destination_table'

-- Truncate destination table
SET @sql = 'TRUNCATE TABLE ' + @destination_table_name
EXEC(@sql)

-- Insert data from source table to destination table
SET @sql = 'INSERT INTO ' + @destination_table_name + ' (column1, column2, column3) SELECT column1, column2, column3 FROM ' + @source_table_name
EXEC(@sql)

-- Update destination table
SET @sql = 'UPDATE ' + @destination_table_name + ' SET column4 = column1 + column2 + column3 WHERE column1 > 0'
EXEC(@sql)

-- Delete records from destination table
SET @sql = 'DELETE FROM ' + @destination_table_name + ' WHERE column1 = 0'
EXEC(@sql)

END
GO

-- Execute the stored procedure
EXEC etl_process