Reads a single value from a standard sql statement. See SQL Statements for how to create statements.
statementName - The name of the standard statement
additionalParameters - (optional) all controls in the current config are set as paramters automatically. If you need to add additional parameters, you can use this json object to set them
columnName - (optional) the column name to pick from the first result line. If this is empty, the first column will be used
queryOptions - (optional) a json object with options for the request
timeout - (optional) timeout for the SQL Request. Default is 30 seconds
connectionKey - (optional) a key to a custom settings entry with the connection string to an external MSSQL database
Lets assume, we have a standard statement "select adrName, adrStreet from address where id=@id"