SELDEL Process
To access this process:
- Data ribbon >> Data Tools >> Tables >> Delete Fields.
- View the Find Command screen, select SELDEL and click Run.
- Enter "SELDEL" into the Command Line and press <ENTER>.
See this process in the Command Table.
Process Overview
Selectively deletes named fields from the input file during a copy to the output file.
The fields to be deleted are specified as *F1 to *Fn. Any number of required fields may be deleted, but only one is compulsory.
If retrieval criteria are specified they will be ignored if they are on the deleted fields.
If the optional parameter @KEEPALL is zero (default) the output file will only contain one entry for each combination of output field values, provided that the input file is first sorted on these fields. If the input file is not sorted, then the output file will contain one entry for each combination of output field values which occur together in the input file.
The process works by checking the selected field values against the values just written to the output file. If they are identical, the current record is skipped.
Input Files
|
Name |
Description |
I/O Status |
Required |
Type |
|
IN |
Input file. |
Input |
Yes |
Table |
|
FIELDLST |
File to supply selected fields. |
Input |
No |
Undefined |
Output Files
|
Name |
I/O Status |
Required |
Type |
Description |
|
OUT |
Output |
Yes |
Table |
Output file with deleted fields. |
Fields
|
Name |
Description |
Source |
Required |
Type |
Default |
|
F1 |
Deleted field 1. |
IN |
No |
Any |
Undefined |
|
F2-F25 |
Optional selected fields. |
IN |
No |
Any |
Undefined |
|
FIELDNAM |
Field in FIELDLST to identify selected fields. |
FIELDLST |
No |
Character |
Undefined |
Parameters
|
Name |
Description |
Required |
Default |
Range |
Values |
||||||
|
KEEPALL |
Used to keep or delete records with duplicate successive key field values
|
No | 0 | 0,1 | 0,1 | ||||||
|
KEYTOL |
KEYTOL is the tolerance value used to test whether numeric key values are equal. It must be greater than or equal to zero. It replaces the previous heuristic comparison method. If KEYTOL is set to a negative value then zero is used. In a macro KEYTOL can be set to absent using -. "@KEYTOL=-" This will revert to legacy behaviour of a tolerance of zero being used. |
No |
0.00001 |
0,+ |
Undefined |
Example
!SELDEL &IN(ASSAYS),&OUT(CUAU),*F1(BHID),*F2(FROM),*F3(TO)
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