ADO.NET Provider for GraphQL

Build 21.0.7940

DELETE Statements

To delete information from a table, use DELETE statements.

DELETE Syntax

The DELETE statement requires the table name in the FROM clause and the row's primary key in the WHERE clause, as shown in the following example:

<delete_statement> ::= DELETE FROM <table_name> WHERE { Id = <expression> } [ { AND | OR } ... ]

<expression> ::=
  | @ <parameter> 
  | ?
  | <literal>

You can use the ExecuteNonQuery method to execute data manipulation commands and retrieve the number of affected rows, as shown in the following example:

C#

String connectionString = "AuthScheme=OAuth;OAuthVersion=2.0;CallbackURL=http://localhost:33333;OauthClientId=MyOAuthClientId;OAuthClientSecret=MyOAuthClientSecret;OAuthAccessTokenURL=https://mysite.com/login/oauth/access_token;";
using (GraphQLConnection connection = new GraphQLConnection(connectionString)) {
  int rowsAffected;
  GraphQLCommand cmd = new GraphQLCommand("DELETE FROM Users WHERE Id = @myId", connection);
  cmd.Parameters.Add(new GraphQLParameter("myId","1"));
  rowsAffected = cmd.ExecuteNonQuery();
}

VB.NET

  
Dim connectionString As [String] = "AuthScheme=OAuth;OAuthVersion=2.0;CallbackURL=http://localhost:33333;OauthClientId=MyOAuthClientId;OAuthClientSecret=MyOAuthClientSecret;OAuthAccessTokenURL=https://mysite.com/login/oauth/access_token;"
Using connection As New GraphQLConnection(connectionString)
  Dim rowsAffected As Integer
  Dim cmd As New GraphQLCommand("DELETE FROM Users WHERE Id = @myId", connection)
  cmd.Parameters.Add(New GraphQLParameter("myId", "1"))
  rowsAffected = cmd.ExecuteNonQuery()
End Using

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Build 21.0.7940