HEIDENHAIN TNC 620 User Manual page 339

Optional:
WHERE selection criteria: A selection criterion
consists of a column name, condition and
comparator. Link several selection criteria with
logical AND or OR. Program the comparative
value directly or with a Q parameter. A Q
parameter is introduced with a colon and placed
in single quotation marks
Optional:
ORDER BY column name ASC for ascending
sorting, or ORDER BY column name DESC for
descending sorting. If you program neither ASC
nor DESC, ascending sorting is executed by
default. The TNC places the selected rows in the
indicated column
Optional:
FOR UPDATE (keyword): The selected rows
are locked against write-accesses from other
processes.
Condition
Equal to
Not equal to
Less than
Less than or equal to
Greater than
Greater than or equal to
Linking multiple conditions:
Logical AND
Logical OR
HEIDENHAIN | TNC 620 | Conversational Programming User's Manual | 10/2015
Accessing tables with SQL commands
Programming
= ==
!= <>
<
<=
>
>=
AND
OR
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