UPDATE Statements
To modify existing records, use UPDATE statements.
Update Syntax
The UPDATE statement takes as input a comma-separated list of columns and new column values as name-value pairs in the SET clause, as shown in the following example:
UPDATE <table_name> SET { <column_reference> = <expression> } [ , ... ] WHERE { Id = <expression> } [ { AND | OR } ... ]
<expression> ::=
| @ <parameter>
| ?
| <literal>
You can use the ExecuteNonQuery method to execute data manipulation commands and retrieve the rows affected, as shown in the following example:
C#
String connectionString = "user=myuseraccount;password=mypassword;"; using (GmailConnection connection = new GmailConnection(connectionString)) { int rowsAffected; GmailCommand cmd = new GmailCommand("UPDATE Inbox SET MessageBody='Test 2' WHERE Id = @myId", connection); cmd.Parameters.Add(new GmailParameter("myId","1001")); rowsAffected = cmd.ExecuteNonQuery(); }
VB.NET
Dim connectionString As [String] = "user=myuseraccount;password=mypassword;" Using connection As New GmailConnection(connectionString) Dim rowsAffected As Integer Dim cmd As New GmailCommand("UPDATE Inbox SET MessageBody='Test 2' WHERE Id = @myId", connection) cmd.Parameters.Add(New GmailParameter("myId", "1001")) rowsAffected = cmd.ExecuteNonQuery() End Using