HEIDENHAIN TNC 640 (34059x-02) ISO programming - Manual (Page 283)

Accessing tables with SQL commands 9.8
9
TNC 640 | User's Manual for DIN/ISO Programming | 5/2013
283
Optional:
WHERE selection criteria: A selection criterion
consists of a column name, condition (see table)
and comparator. Link selection criteria with
logical AND or OR. Program the comparator
directly or with a Q parameter. A Q parameter
is introduced with a colon and placed in single
quotation marks (see example).
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 Programming
Equal to = ==
Not equal to != <>
Less than <
Less than or equal to <=
Greater than >
Greater than or equal to >=
Linking multiple conditions:
Logical AND AND
Logical OR OR