I collected information from various sources, mostly from sqlite.org, and put them together: First, by default, multiple processes can have the same SQLite database open at the same time, and several read accesses can be satisfied in parallel. In case of writing, a single write to the database locks the database for a short time, … Read more
SELECT * FROM Table_Name LIMIT 5;
This will work UPDATE software SET purchprice = (SELECT purchprice FROM softwarecost WHERE id = software.id) where EXISTS (SELECT purchprice FROM softwarecost WHERE id = software.id) Here we use exists because without that the query will set software.purchprice to null if no “correlated” row is found.
If your device is running Android v4 or above, you can pull app data, including it’s database, without root by using adb backup command, then extract the backup file and access the sqlite database. First backup app data to your PC via USB cable with the following command, replace app.package.name with the actual package name … Read more
Have a look at Selecting a Random Row from an SQLite Table SELECT * FROM table ORDER BY RANDOM() LIMIT 1;
SELECT julianday(‘now’) – julianday(DateCreated) FROM Payment;
What also is being said in the comments, SQLite sees your input as 1, 25, 62, 7. I also had a problem with , and in my case it was solved by changing “separator ,” into “.mode csv”. So you could try: sqlite> create table foo(a, b); sqlite> .mode csv sqlite> .import test.csv foo The … Read more
SQLite Release 3.25.0 will add support for window functions 2018-09-15 (3.25.0) Add support for window functions Window Functions : A window function is a special SQL function where the input values are taken from a “window” of one or more rows in the results set of a SELECT statement. SQLite supports the following 11 built-in … Read more
From the SQLite web site: SQLite keeps track of the largest ROWID that a table has ever held using the special SQLITE_SEQUENCE table. The SQLITE_SEQUENCE table is created and initialized automatically whenever a normal table that contains an AUTOINCREMENT column is created. The content of the SQLITE_SEQUENCE table can be modified using ordinary UPDATE, INSERT, … Read more
The two syntax forms are a little confusing because they reverse the numbers: LIMIT <skip>, <count> Is equivalent to: LIMIT <count> OFFSET <skip> It’s compatible with the syntax from MySQL and PostgreSQL. MySQL supports both syntax forms, and its docs claim that the second syntax with OFFSET was meant to provide compatibility with PostgreSQL. PostgreSQL … Read more