Android本地数据库升级

Alert Table TableName Add ColumnName

db.beginTransaction();

db.execSQL( "ALTER TABLE " + SystemNoticeTable.TABLE_NAME + " RENAME TO __temp__" + SystemNoticeTable.TABLE_NAME );

db.execSQL(SystemNoticeTable. getInstance().toCreateQuery());

db.execSQL( "INSERT INTO "+SystemNoticeTable.TABLE_NAME+" SELECT *, '' FROM __temp__"+SystemNoticeTable.TABLE_NAME);

db.execSQL( "DROP TABLE __temp__"+SystemNoticeTable.TABLE_NAME);

db.setTransactionSuccessful();
db.endTransaction();