Sqlite autoincrement only unique8/13/2023 ![]() So if they get re-added, the hidden field could be set to false and Math would still be at id #1. You could also never remove the lessons at all but maybe add a hidden boolean field.How about not displaying the number at all so it can be 1 or 1001 and your application won't matter?.I think the real question is why is your application depending on this database internal number? It really shouldn't care. SQLite Error 1: AUTOINCREMENT is only allowed on an INTEGER PRIMARY KEY. TableUtils.createTable(WeekDefinition.class) You could also drop and recreate the table as well: TableUtils.dropTable(WeekDefinition.class) In SQLite, a column with type INTEGER PRIMARY KEY is an alias for the ROWID (except in WITHOUT ROWID tables) which is always a 64-bit signed integer. "delete from sqlite_sequence where name='weekdefinition' ") Summary The AUTOINCREMENT keyword imposes extra CPU, memory, disk space, and disk I/O overhead and should be avoided if not strictly needed. WeekDefinitionDao.updateRaw("delete from 'weekdefinition' ") LessonDao.updateRaw("delete from sqlite_sequence where name='lesson' ") lessonDao.updateRaw("delete from 'lesson' ") There is also executeRaw for other commands. You can leave the column out of the insert statement (implying a null) or you can insert an explicit NULL into the column to cause it to autoincrement. If you want to issue general database commands in ORMLite, you can use the updateRaw method. I am using Entity Framework Core 2.0 for Sqlite code first in my UWP and. I need "reset" sqlite_sequence table ( or there is better solution ?) SQLite provides the auto-increment facility to the user, in which that we increment integer value automatically as per the requirement. And this is problem because id in table lesson start from value 4 ( seq from sqlite_sequence for lesson and add 1 ) : id = 4 MathĪnd weekDefinition id = 13 lesson_id = 1 nr = 20Īnd for lesson id = 4, Math i should get weekDefinitios, but in weekDefinitions lessons_id has value only from 1 to 3Īnd this is my problem. ![]() Lesson and WeekDef are empty after that, but sqlite_sequence is still the same. Now, I delete all rows from tables Lesson and WeekDefinition. SQLite add this row into sqlite_sequence ( when use autoincrement ) rowId = 1 name = lesson seq = 3 For example id = 1 MathĪnd in weekDefinition : id = 1 lesson_id = 1 nr = 20 Now, when I add new lessons, id is increment. In my project I persist class Lesson and class WeekDefinition. ALTER TABLE RENAME The RENAME TO syntax changes the name of table-name to new-table-name. ![]() The ALTER TABLE command in SQLite allows these alterations of an existing table: it can be renamed a column can be renamed a column can be added to it or a column can be dropped from it. In my class extends OrmLiteSqliteOpenHelper I use SQLiteDatabase to make that update. SQLite supports a limited subset of ALTER TABLE. I can't find ORLite tool to do this, so instead I use simple sqlite query. How to update table sqlite_sequence in Ormlite ? I just need update seq.
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