Bulk delete customers using IDs from SQL Server

Bulk deletes customers by reading Id values from an external SQL Server database. You can also pass $$ContineOn404Error as a column to control error handling per row.

Standard SQL query example

This is the base query accepted by the connector. To execute it in SQL Server, you have to pass it to the Data Gateway via a Linked Server. See how to accomplish this using the examples below.

DELETE FROM Customers
SOURCE('MSSQL'
  ,'Data Source=localhost;Initial Catalog=tempdb;Integrated Security=true'
  ,'select 111 as Id,1 as [$$ContineOn404Error]
    UNION
    select 222 as Id,1 as [$$ContineOn404Error]
   '
)

Using OPENQUERY in SQL Server

SELECT * FROM OPENQUERY([LS_TO_SHOPIFY_IN_GATEWAY], 'DELETE FROM Customers
SOURCE(''MSSQL''
  ,''Data Source=localhost;Initial Catalog=tempdb;Integrated Security=true''
  ,''select 111 as Id,1 as [$$ContineOn404Error]
    UNION
    select 222 as Id,1 as [$$ContineOn404Error]
   ''
)')

Using EXEC in SQL Server (handling larger SQL text)

The major drawback of OPENQUERY is its inability to incorporate variables within SQL statements. This often leads to the use of cumbersome dynamic SQL (with numerous ticks and escape characters).

Fortunately, starting with SQL 2005 and onwards, you can utilize the EXEC (your_sql) AT [LS_TO_SHOPIFY_IN_GATEWAY] syntax.

DECLARE @MyQuery NVARCHAR(MAX) = 'DELETE FROM Customers
SOURCE(''MSSQL''
  ,''Data Source=localhost;Initial Catalog=tempdb;Integrated Security=true''
  ,''select 111 as Id,1 as [$$ContineOn404Error]
    UNION
    select 222 as Id,1 as [$$ContineOn404Error]
   ''
)'
EXEC (@MyQuery) AT [LS_TO_SHOPIFY_IN_GATEWAY]