Read an integer
value from a database.
SQL command for selecting the value to be read
Integer value read or 0.
The following gets the article number of the first data item in table pricelist for which the field color is set to blue:
"select articlenum from pricelist where color=blue")
1. 0 is returned if no integer value can be found.
2. If the given SQL selection command does not denote a single value,
the first value to which the selection criterion applies is returned.
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