Optimize Parametrized Queries With ADO Objects

When you write Insert statements, it can be difficult to accommodate the possible values end users might enter into a textbox. The most common task is replacing single quotes with double quotes. However, parameterized queries provide two benefits: You do not have to parse data entered by users?except for business rules; and SQL Server 7.0 immediately caches the SQL statement:

 Dim cmd As ADODB.CommandDim prm As ADODB.ParameterSet cmd = New ADODB.CommandSet prm = New ADODB.ParameterWith cmd	.ActiveConnection = CONNECT_STRING	.CommandText = "INSERT INTO employees " & _		"(name) VALUES(?)"	.CommandType = adCmdText	Set prm = .CreateParameter(, adChar, _		adParamInput, 50, Me.txtName.Text)	.Parameters.Append prm	.ExecuteEnd WithSet cmd = NothingSet prm = Nothing
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