MERGE, /KEY, Full Description
*Conan The Librarian
The /KEY qualifier specifies all the necessary information about a key field. If the file is to be sorted using entire records with character data in ascending order, you do not need to specify the key information. When a key field must be described, you must specify both the position and the size of the key. In addition, if the sorting or merging operation is to be done in descending alphabetic or numeric order, specify DESCENDING in the key description. If the data in the key fields is not character data, you must specify the data type. The following data types are recognized by the Sort/Merge utility: BINARY, [SIGNED] BINARY, UNSIGNED CHARACTER DECIMAL, LEADING_SIGN, SEPARATE_SIGN [SIGNED] DECIMAL, LEADING_SIGN, [OVERPUNCHED_SIGN, SIGNED] DECIMAL [,SIGNED, TRAILING_SIGN, OVERPUNCHED_SIGN] DECIMAL, [TRAILING SIGN], SEPARATE_SIGN, [SIGNED] DECIMAL, UNSIGNED D_FLOATING F_FLOATING G_FLOATING H_FLOATING PACKED_DECIMAL S_FLOATING (Alpha only) T_FLOATING (Alpha only) ZONED The items in brackets are defaults and need not be specified. Multiple Keys You can specify up to 255 key fields in a sorting operation. If you do specify multiple keys, decide which is primary, which is secondary, and so on; then, in the command string, list them in the order of their priority. By default, Sort assigns 1 to the first key specified in the command line, 2 to the second key, and so on. If you do not list the keys in the order of their priority, specify the order of each with the parameter NUMBER:n. For each Sort key, you must use a separate /KEY qualifier. If Sort finds /KEY parameters repeated after a single /KEY qualifier, it does not treat these as specifications for multiple keys; instead, the duplicate parameters override previously specified parameters.