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POHow to Delete Data from Two tables in single query
 

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  1. POHow to Delete Data from Two tables in single query
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    <p>I have two tables: <code>Accounts</code>, which contains the information of accounts that a user has, and <code>AccountUsers</code>, which contains the list of users that have accounts in aforementioned <code>Accounts</code> table.</p> <p>If I have to delete a user then I would have to delete them from both tables where as <code>AccountUsers</code> will have one row of that user where as other may have many because a single user can have many accounts.</p> <p>I wrote the following code that works well and deletes the row from both tables, but whenever there are multiple rows in the second table it fails to delete them and <code>ExecuteNonQuery()</code> returns 0, which means 0 rows are affected.</p> <p>I would like to know if it can be done in a single line. Also, how can it be done for multiple rows in the second table, as my existing code only works if there is single row.</p> <p>Code: </p> <pre><code>public static bool DeleteUser(int UserId) { if (ConnectDatabase()) { sql_cmd = new SqlCommand(); sql_cmd.Connection = sql_con; sql_cmd.Parameters.Add("@userId", SqlDbType.Int).Value = UserId; sql_cmd.CommandText = "DELETE FROM AccountsUsers WHERE Id = @userId"; if (sql_cmd.ExecuteNonQuery() == 1) { sql_cmd = new SqlCommand(); sql_cmd.Connection = sql_con; sql_cmd.Parameters.Add("@userId", SqlDbType.Int).Value = UserId; sql_cmd.CommandText = "DELETE FROM Accounts WHERE userId = @userId"; if (sql_cmd.ExecuteNonQuery() == 1) { return true; } else return false; } else return false; } else return false; } </code></pre>
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    1. USAfnan Bashir
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