Difference between revisions of "LIST DATABASE"
Yvonnemilne (Talk | contribs) |
Yvonnemilne (Talk | contribs) |
||
| Line 60: | Line 60: | ||
[[Category:Commands]] | [[Category:Commands]] | ||
[[Category:SQL]] | [[Category:SQL]] | ||
| + | [[Category:Databases]] | ||
| + | [[Category:Databases Commands]] | ||
Revision as of 15:53, 1 June 2009
Class
Databases
Purpose
List information about the active database
Syntax
LIST DATABASE [TO FILE <.txt filename> | (<expC>)] | [TO PRINT]
See Also
ADATABASES(), ALTER INDEX, ALTER TABLE, CLOSE DATABASES, CLOSE TABLES, COMPILE DATABASE, CREATE DATABASE, CREATE INDEX, CREATE TABLE, CREATE VIEW, DB_DATADIR, DB_PRINT, DBUSED(), DISPLAY DATABASE, DISPLAY INDEXES, DISPLAY TABLES, DROP DATABASE, DROP INDEX, DROP TABLE, GETENV(), LIST INDEXES, LIST TABLES, OPEN DATABASE, SET EXCLUSIVE, SET PAGELENGTH, SET PAGEWIDTH, SET PRINTER, USE
Description
The LIST DATABASE command is used to display information about the currently active database.
Databases in Recital are implemented as directories containing files that correspond to the tables and associated files in the database. Operating System file protection can be applied individually to the files for added security. The directories are sub-directories of the Recital data directory. The environment variable / symbol DB_DATADIR points to the current Recital data directory and can be queried using the GETENV() function. Files from other directories can be added to the database using the ADD TABLE command or via the database catalog and SET AUTOCATALOG functionality. Databases are opened using the OPEN DATABASE command.
The LIST DATABASE command displays the following information:
- Database Name, e.g. southwind
- Database Path, e.g. /usr/recital/data/southwind
and for each table in the database the equivalent of LIST STRUCTURE INDEX followed by LIST DICTIONARY:
- Table file name
- Number of records
- Date of creation
- Date of last update
- Encryption status
- Field names, types, sizes and description
- Total record length
- Production DBX file name
- Index tag names, keys, types and lengths
- Dictionary information
| Keyword | Description |
|---|---|
| TO <file> | The display output will be sent to the specified file. The filename can be substituted with a <expC>, enclosed in round brackets, which returns a valid filename. If no file extension is specified, then ".txt" will be used. The command SET PAGELENGTH governs the output file pagination and SET PAGEWIDTH defines the width of each page. Page numbers are centered on the bottom of the page according to width. |
| TO PRINT | The display output will be sent to a printer. The TO PRINT option will default to a local printer unless the command SET PRINTER TO \\SPOOLER is issued. The print request will then be spooled to the system printer, which is defined by the environment variable DB_PRINT. |
Example
VFP/SQL > OPEN DATABASE southwind VFP/SQL > LIST DATABASE
Products
Recital Database Server, Recital Mirage Server, Recital Terminal Developer
