[About The Guide]
Summarize records by key value to a database (.dbf) file
TOTAL ON <expKey> [FIELDS <idField list>]
[<scope>] [WHILE <lCondition>] [FOR <lCondition>]
ON <expKey> defines the group of records that produce a new record
in the target database file. To make the summarizing operation
accurate, the source database file should be INDEXed or SORTed on this
FIELDS <idField list> specifies the list of numeric fields to TOTAL.
If the FIELDS clause is not specified, no numeric fields are totaled.
Instead each numeric field in the target file contains the value for the
first record matching the key expression.
TO <xcDatabase> is the name of the target file that will contain the
copy of the summarized records. Specify this argument as a literal file
name or as a character expression enclosed in parentheses. Unless
otherwise specified, TOTAL assumes a .dbf extension.
<scope> is the portion of the current database file to TOTAL. The
default is ALL records.
WHILE <lCondition> specifies the set of records meeting the
condition from the current record until the condition fails.
FOR <lCondition> specifies the conditional set of records to TOTAL
within the given scope.
TOTAL is a database command that sequentially processes the current
database file, summarizing records by the specified key value and
copying them to a new database file. TOTAL works by first copying the
structure of the current database file to <xcDatabase>, except for memo
fields. It then sequentially scans the current database file within the
specified scope of records. As each record with a unique <expKey> value
is encountered, that record is copied to the new database file. The
values of numeric fields specified in <idField list> from successive
records with the same <expKey> value are added to fields with the same
names in <xcDatabase>. Summarization proceeds until a record with a new
key value is encountered. The process is then repeated for this record.
Since TOTAL processes the source database file sequentially, it must be
INDEXed or SORTed in <expKey> order for the summarization to be correct.
To successfully TOTAL numeric fields, the source numeric fields must be
large enough to hold the largest total possible for that numeric field.
If not, a runtime error is generated.
. Deleted source records: If DELETED is OFF, deleted records in
the source file are TOTALed. Records in the target <xcDatabase>
inherit the deleted status of the first matching record in the source
file, just as nontotaled fields inherit their values. If DELETED is
ON, however, none of the deleted source records are TOTALed.
. In this example, a database file is TOTALed ON the key
expression of the controlling index using a macro expression. When
the macro expression is encountered, the expression is evaluated and
the resulting character string is substituted for the TOTAL <expKey>
USE Sales INDEX Branch NEW
TOTAL ON &(INDEXKEY(0)) FIELDS Amount TO Summary
Files Library is CLIPPER.LIB.
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