Select - Numeric Vectors

Expression

Select using the given expression.

Null

Select for null values in the source field.

• null - Select records with NULL values.
• not null - Select records with non-NULL values.

Search

Select by making comparisons against the desired extraction from the numeric vector  field specified in the Use parameter, using the given Condition,  compared to the given value or values,  which can be values from a field, a specified value, or the result of an expression that evaluates to a numeric value or to a datetime value depending on the data type of the extraction specified in the Use parameter.

Use options:

• value 0 - Use the first component of the vector.
• value 1 - Appears with x2, x3 and x4 types.  Use the second component of the vector.
• value 2 - Appears with x3 and x4 types.  Use the third component of the vector.
• value 3 - Appears with x4 types.  Use the fourth component of the vector.
• vector -  Use the vector value in the source field.  

Condition options:

• between - Select records with values between the At least and At most values, inclusive.
• equal (=) - Select records with values equal to the given value.
• greater (>) - Select records with values greater than the given value.
• greater or equal (>=) - Select records with values greater than or equal to the given value.
• less (<) - Select records with values less than the given value.
• less or equal (<=) - Select records with values less than or equal to the given value.
• not equal (<>) - Select records with values not equal to the given value.

If we would like to select records that are NOT variations of the above, for example not between, select on the basis of one of the above and press Ctrl-I or Edit - Select Inverse to invert the selection.   Selecting using between and then pressing Ctrl-I is the equivalent of "not between" the given values.

The Round box allows automatic rounding of the source field number before comparing to the specified value:

• none -  No rounding.
• down (floor) - Round down to the next lowest Round to position value. 400.7 would round down to 400.   -400.7 would round down to -401 (which is a smaller amount, and thus "down," from 400).
• to nearest (round) - Round up or down to the nearest Round to position value. When rounding to 1, a value of 400.5 or greater fraction will get rounded up to 401 while fractional parts less than .5 will get rounded down to 400.
• to zero (trunc) - Rounding towards zero: Equivalent to rounding down for positive numbers, and rounding up for negative numbers.
• up (ceil) - Round up to the next highest Round to position value. 400.2 would round up to 401.   -400.2 would round up to -400 (which is a large amount, and thus "up," from 400).

Statistic

Selects records based on how large or small their values are relative to other values in the table:

• maximum - selects records with the maximum value,
• minimum - selects records with the minimum value,
• median - selects records with the median value,
• top - selects the specified number of records with the largest values,
• bottom - selects the specified number of records with the smallest values,
• top percent - selects records with values larger than the specified percentile, with an option to include or exclude the bounding percentage.
• bottom percent - selects records with values smaller than the specified percentile, with an option to include or exclude the bounding percentage.

Numeric vector order is computed based on the first component being the most significant, followed by the second component in the event of a tie in the first component, followed by the third component, and so on.

Unique

Selects records based on how many times their values occur in a table:

• duplicate - for each duplicate value, selects all such records except one,
• non-unique - selects records for values that occur more than once,
• unique - selects records for values that occur only once.