Different db for testing in Django?
In your settings.py (or local_settings.py): import sys if ‘test’ in sys.argv: DATABASES[‘default’] = { ‘ENGINE’: ‘django.db.backends.sqlite3’, ‘NAME’: ‘mydatabase’ }
sqlite
Python sqlite3 parameterized drop table
You cannot use parameters for table names nor column names. Alternatively you could make it a two-step process, e.g.: a_table_name = “table_a” sql_stmt = f”””DROP TABLE {a_table_name}””” self.conn.execute(sql_stmt) And if you’re doing that you may want to explicitly specify which tables can be deleted… TABLES_THAT_CAN_BE_DROPPED = (‘table_a’,’table_b’,) if a_table_name in TABLES_THAT_CAN_BE_DROPPED: # use code snippet … Read more
Using COLLATE in Android SQLite – Locales is ignored in LIKE statement
Have you had a look at the SQLite documentation for LIKE? It has come information about non ASCII characters and a bug. Maybe Android has an older version of SQLite installed where this is a problem. I think the second normalised column might be your best option unfortunately.
Copy table structure to new table in sqlite3
You could use a command like this: CREATE TABLE copied AS SELECT * FROM mytable WHERE 0 but due to SQLite’s dynamic typing, most type information would be lost. If you need just a table that behaves like the original, i.e., has the same number and names of columns, and can store the same values, … Read more
sqlite insert into table select * from
explicitly specify the column name in the INSERT clause, INSERT INTO destinationTable (risposta, data_ins) SELECT STATUS risposta, DATETIME(‘now’) data_ins FROM sourceTable
DbFunctions.TruncateTime LINQ equivalent in EF CORE
In EF6 DbFunctions.TruncateTime is used instead of DateTime.Date property because for some reason the later is not supported. In EF Core the former is not needed simply because DateTime.Date now is recognized and translated correctly. group events by events.DateTimeFrom.Date into dateGroup Unfortunately there is no documentation (yet) of what is supported, so as a general … Read more
converting int to real in sqlite
Just multiply one of the numbers by 1.0: SELECT something*1.0/total FROM somewhere That will give you floating point division instead of integer division.
Passing SQLite variables in Python
Use parameters to .execute(): query = “”” INSERT INTO credit (bank, number, card, int1, value, type, int2) VALUES (?, ?, ?, ?, ?, ?, ?) “”” data = [‘Citi’, ‘5567’, ‘visa’, 6000, 9.99, ’23’, 9000] cursor.execute(query, data) According to PEP249: .execute(operation[,parameters]): Prepare and execute a database operation (query or command). Parameters may be provided as … Read more
SQLiteOpenHelper onUpgrade() Confusion Android
Ok, before you run into bigger problems you should know that SQLite is limited on the ALTER TABLE command, it allows add and rename only no remove/drop which is done with recreation of the table. You should always have the new table creation query at hand, and use that for upgrade and transfer any existing … Read more
Creating stored procedure in SQLite
SQLite has had to sacrifice other characteristics that some people find useful, such as high concurrency, fine-grained access control, a rich set of built-in functions, stored procedures, esoteric SQL language features, XML and/or Java extensions, tera- or peta-byte scalability, and so forth Source : Appropriate Uses For SQLite