![]() Let us create a table called Names that we want to rename. sqlite> CREATE TABLE Names(Id INTEGER, Name TEXT) It is not possible to rename a column, removeĪ column, or add or remove constraints from a table. This statement in SQLite allows a user to rename a table or to add a newĬolumn to an existing table. SQLite supports a limited subset of the ALTER TABLE statement. This SQL statement deletes the Cars table from the test2ĭatabase. This statement will drop the Testing table only if it exists. IF EXISTS clause we can avoid this error. Trying to drop a table that does not exist leads to an error. The DROP TABLE statement removes the Testing tableįrom the database. The DROP statement is used to delete a table from a database.īooks Cars2 Friends Reservations test2.Cars A temporaryĭatabase is destroyed each time the database connection is closed. With the TEMPORARY keyword, we create a temporary database. Sqlite> SELECT * FROM temp.Cars WHERE Id=1 Sqlite> INSERT INTO temp.Cars VALUES (1, 'Kia', 24300) Advertisements sqlite> CREATE TEMPORARY TABLE Cars(Id INTEGER PRIMARY KEY, Name TEXT, Price INTEGER) In this case, if the database name is not specified, the main Want to create a table in the test2 database. Since we have two databases it is mandatory to specify the database name if we Sqlite> SELECT * FROM test2.Cars WHERE Id=1 Sqlite> SELECT * FROM main.Cars WHERE Id=1 Sqlite> INSERT INTO test2.Cars VALUES(1, 'Porsche', 107699) sqlite> CREATE TABLE test2.Cars(Id INTEGER PRIMARY KEY, Name TEXT, Price INTEGER) The first database is called main and the new database is called We add a new database to the current database connection with the ATTACH DATABASE ![]() sqlite> ATTACH DATABASE 'test2.db' AS test2 The above statement creates an identical table to the Cars ![]() sqlite> CREATE TABLE Cars2 AS SELECT * FROM Cars AS statement enables toĬreate a new table based on a SELECT statement. We get no error message for trying to create a table that already exists. sqlite> CREATE TABLE IF NOT EXISTS Testing(Id INTEGER) With this clause nothing is done and we receive no error. The CREATE TABLE statement has an optional IF NOT EXISTSĬlause. If we try to create a table that already exists, we get an error. sqlite> CREATE TABLE Testing(Id INTEGER) schema command shows the formal definition of the table. We create a simple Testing table with the CREATE TABLE
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![]() Click Backup and wait for the backup to finish.In OnSite go to Tools > Utilities > Backup Database.Note: If you are running OnSite 3.0–3.6.8 you configure backups from Tools > Utilities > Backup Database, in the Schedule tab. Restoring from a backup that doesn't include photos can require you to add photos again. Do not clear this setting unless you are advised to do so by Lightspeed Support. If you do not select Include product photos, product and customer photos are excluded from backups. Lightspeed Support is not responsible for data loss incurred through file system issues or external drive failure. To back up to a non-default location you may need to modify file permissions to give the OnSite Server user account read and write access to that folder or volume. Changing the location is recommended for advanced users only. This can help identify your backups if you archive backups for multiple stores.īy default OnSite backs up to Macintosh HD/Users/Shared/Lightspeed. You can change the file prefix so that backups are labeled with the name of your store, for example A&G Knitting Co. File prefixīy default files are labeled with OnSite Server and the time and date the backup was generated. To run additional scheduled backups each day, click the + button and choose a time. To change the days when OnSite backs up, from Run Scheduled Backups make a selection. Click the padlock at the bottom of the window and click the Backup tab.īy default OnSite backs up every day at 11:00 P.M.On your OnSite server from the Apple menu click System Preferences > Lightspeed Server.On your OnSite server from the Apple menu click System Preferences > Energy Saver. Tell your staff not to switch off the Mac before leaving if you run scheduled backups overnight. Make sure that your OnSite server is powered on and not asleep when scheduled backups are set to run as this can prevent your backup from completing successfully. To set your energy saver settings for backups Contact a Lightspeed reseller for more information. We recommend that you have an external backup device or offsite backup strategy to protect the contents of your Mac, including your OnSite backups. ![]() To keep your information safe, you should also back up before you upgrade, make batch changes, or import from a spreadsheet. Run regular OnSite backups to protect your business data. |
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