To solve this problem, I store dates as YYYYMMDD. Thus, where mydate >= ‘20090101’ and mydate <= ‘20050505’ It just plain WORKS all the time. You may only need to write a parser to handle how users might enter their dates so you can convert them to YYYYMMDD.
SQLite way is to use a CHECK constraint. Some examples: CREATE TABLE prices ( id INTEGER PRIMARY KEY, pName TEXT CHECK( LENGTH(pName) <= 100 ) NOT NULL DEFAULT ”, pType TEXT CHECK( pType IN (‘M’,’R’,’H’) ) NOT NULL DEFAULT ‘M’, pField TEXT CHECK( LENGTH(pField) <= 50 ) NULL DEFAULT NULL, pFieldExt TEXT CHECK( LENGTH(pFieldExt) <= … Read more
Here are step-by-step instructions (mostly taken from a combination of the other answers). This works even on devices that are not rooted. Connect your device and launch the application in debug mode. You may want to use adb -d shell “run-as com.yourpackge.name ls /data/data/com.yourpackge.name/databases/” to see what the database filename is. Notice: com.yourpackge.name is your … Read more
SELECT julianday(‘now’) – julianday(DateCreated) FROM Payment;
The sqlite3 command line tool features the .backup dot command. You can connect to your database with: sqlite3 my_database.sq3 and run the backup dot command with: .backup backup_file.sq3 Instead of the interactive connection to the database, you can also do the backup and close the connection afterwards with sqlite3 my_database.sq3 “.backup ‘backup_file.sq3′” Either way the … Read more
There are several ways, like: where some_column is null or some_column = ” or where ifnull(some_column, ”) = ” or where coalesce(some_column, ”) = ” of where ifnull(length(some_column), 0) = 0
You want to feed the create.sql into sqlite3 from the shell, not from inside SQLite itself: $ sqlite3 auction.db < create.sql SQLite’s version of SQL doesn’t understand < for files, your shell does.
Use the SQLite keyword default db.execSQL(“CREATE TABLE ” + DATABASE_TABLE + ” (” + KEY_ROWID + ” INTEGER PRIMARY KEY AUTOINCREMENT, ” + KEY_NAME + ” TEXT NOT NULL, ” + KEY_WORKED + ” INTEGER, ” + KEY_NOTE + ” INTEGER DEFAULT 0);”); This link is useful: http://www.sqlite.org/lang_createtable.html
Try using || in place of + select locationname || ‘<p>’ from location; From SQLite documentation: The || operator is “concatenate” – it joins together the two strings of its operands.
ALTER TABLE `foo` RENAME TO `bar` SQLite Query Language: ALTER TABLE