Openedge Data Management: SQL Reference - Product ...

ROWID
Syntax
– The digit before a negative rounding_factor is 5 or greater
– The digit after a positive rounding_factor is 5 or greater
• The num_expression is rounded to the next lower digit when:
– The digit before a negative rounding_factor is 4 or less
– The digit after a positive rounding_factor is 4 or less
ROWID
• rounding_factor is an integer between –32 and +32 inclusive, and indicates the digit
position to which you want to round num_expression. Figure 1 illustrates how the digit
positions are numbered. In the figure, the num_expression is 2953861.8320.
Figure 1: ROUND digit positions
• If you do not specify a rounding_factor, the function rounds num_expression to digit 0
(the ones place).
• To round to the right of the decimal point, specify a positive rounding_factor.
• To round to the left of the decimal, specify a negative rounding_factor.
Compatibility
Progress extension
Returns the row identifier of the current row in a table. This function takes no arguments. The
ROWID of a row is determined when the row is inserted into the table. Once assigned, the ROWID
remains the same for the row until the row is deleted. At any given time, each row in a table is
uniquely identified by its ROWID. Using its ROWID is the most efficient way of selecting the row.
ROWID
2953861 .8320
Position -2
Position 0
Position 2
Example This example illustrates the ROWID function, returning all columns from the row in the
customers table where the ROWID = ‘10’:
121