problem to delete data from two table in the same sql

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I have a problem to delete data from two table in the same sql and i have join between to table . how can delete

for example

C#

CommandText = "delete sub_main from sub_main inner join is_main on sub_main.action=is_main.action where row.sub_main='" + dataGridView1.CurrentRow.Cells[1].Value + "' and action.sub_main='" + dataGridView1.CurrentRow.Cells[0].Value + "' and action.is_main='" + dataGridView1.CurrentRow.Cells[2].Value + "'";

Posted 27-Oct-15 20:56pm

Member 11538085

Updated 30-Oct-15 3:48am

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[no name] 28-Oct-15 3:31am

You want to delete data or select data from two table. Because in your question it is selecting but in question title it need to delete. Please confirm.

Sinisa Hajnal 28-Oct-15 3:39am

Simple answer is you don't. A bit more: you can write stored procedure that will accept some id that defines what needs to be deleted (in your case id). You loop through ids (5 ,6) and call the procedure that deletes both. Or you send XML parameter with all values, parse in the database and delete from there (this way you have to construct the XML, but you don't keep open transaction in the code.

Naveen.Sanagasetti 28-Oct-15 6:04am

Could you please elaborate your problem

Richard Deeming 30-Oct-15 9:59am

Your code is vulnerable to SQL Injection[^].

NEVER use string concatenation to build a SQL query. ALWAYS use a parameterized query.

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John C Rayan · Accepted Answer · 2015-10-28T01:40:00

Solution 1

It is not possible to delete rows from multiple tables using single DELETE statement in SQL SERVER.

Create a foreign key between these two tables and use ON DELETE CASCADE.

Have a look at this one

Single SQL Query to delete records in two tables[^]

Posted 28-Oct-15 1:40am

John C Rayan