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SQLite subquery: "IN" the result of the outer query
The GROUP BY name operation can be sped up if the database is able to go through the rows in order, without having to sort the table. This can be done with an index on the name column (the other column makes this a covering index, which helps only a little more): CREATE INDEX user_name_id_index ON user(name, id); The query looks up pair rows by their id, a, and b values; these lookups can be sp

Categories : Sqlite

Sqlite select * from multiple tables
Use UNION or UNION ALL. The first removes duplicates from the result set, the second one doesn't. SELECT * FROM table1 UNION SELECT * FROM table2

Categories : Sqlite

Corona SQLIte : Checking if a value exists or not
Syntax error is a result of misunderstanding of your query by the SQL. One of the most often reasons is incorrect string insertion. So I suppose that row_xx.code is a string To solve the problem you should "quote" row_xx.code by ' symbol like this: CheckInventory = "SELECT * FROM inventory WHERE code ='"..row_2.code.."'" Update To solve the second part of the problem and figure out if value e

Categories : Sqlite

Connecting to sqlite file using Vaadin
When troubleshooting some connection issue buried in layers of abstraction, try to get right to the simplest possible version of what you are doing. First, connect to the database without Vaadin to verify that the db server is running and the connection code is wrong. If that works fine, then the configuration problem is on the Vaadin side. Try connecting without the special sql container. Just

Categories : Sqlite

Using COLLATE on peewee queries
You can specify a collation by building up the SQL clause and passing it to order_by(). For example: collated = Clause(MyModel.field, SQL('COLLATE NOCASE')) MyModel.select().order_by(collated, MyModel.other_field) For the index unfortunately you will need to create that by hand as peewee does not know how to add collation information to the CREATE INDEX SQL. If you'd like to open a pull-reques

Categories : Sqlite

Android - Storing a Camera image file path into SQLite db.
Please check if it helps: Write a method which will return all rows from the images table into a cursor. Create a Cursor adapter and bind it to the list view. Use ImageView.setImageURI() to bind image URI with imageView.

Categories : Sqlite


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Can I get the N record from set in SQLite
SQLite subquery: "IN" the result of the outer query
Sqlite select * from multiple tables
Corona SQLIte : Checking if a value exists or not
Connecting to sqlite file using Vaadin
Using COLLATE on peewee queries
Android - Storing a Camera image file path into SQLite db.
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