sqlite> CREATE TABLE Cars2 AS SELECT * FROM Cars; The above statement creates an identical table to the Cars table using a specific SELECT statement. sqlite> ATTACH DATABASE 'test2.db' AS test2; sqlite> .databases main: /home/janbodnar/tmp/test.db test2: /home/janbodnar/tmp/test2.db ...
Dropping columns is as easy as specifying the column to drop, however, some databases (including SQLite) don't support this feature. Instead you may have to create a new table and migrate the data over. Altering table to remove column(s) ALTER TABLE mytable DROP column_to_be_deleted; ...
Refs#30591-- Adjusted table rebuild for non-pk relationship on SQLite. The existing code was only accounting for primary key changes and not all unique key fields that can be referenced. Note:SeeTracTicketsfor help on using tickets. 用其他格式下载: ...
Check DB schema of table OtherModel1~10, field f's nullable attribution becomes False, and field f's nullable attribution in some other OtherModel becomes True. My investigation: In function BaseDatabaseSchemaEditor._alter_field(), the function call _related_non_m2m_objects(old_field, new...
Vim is a versatile text editor that enables you to modify a wide range of files, including SQLite and various other formats. In addition, if you modify a hexadecimal representation of a binary code, it may be necessary to use the:%! xxd -rcommand mentioned in this guide to convert it ...
Using a model like this: classKostenstelle(models.Model):id=models.AutoField(primary_key=True)name=models.CharField(max_length=60,blank=True)# ... omitted fieldsclassMeta:db_table='kostenstelle' I replaced theidline with id=models.IntegerField(primary_key=True,help_text="...") ...