And in the albums table, the AlbumId is the primary key. The data base is set up 10 rows 3 columns. combine/merge/link which ever you suggest. In the tracks table, the AlbumId column is a foreign key. I want to combine them into one file so I can eliminate duplicates. The tracks table links to the albums table via AlbumId column. Let’s take a look at the tracks and albums tables in the sample database. The following diagram illustrates the INNER JOIN clause: SQLite INNER JOIN examples The name of this file on disk is usually the name of the database file with an extra ' -wal ' suffix, though different naming rules may apply if SQLite is compiled with SQLITEENABLE83NAMES. primarykey Use the schema-defined PRIMARY KEY instead of the rowid to pair rows in the source and destination database. This can be used to add application-defined collating sequences that are required by the schema. Only the rows in the A table: (a1,1), (a3,3) have the corresponding rows in the B table (b1,1), (b2,3) are included in the result set. While a database connection is open on a WAL-mode database, SQLite maintains an extra journal file called a 'Write Ahead Log' or 'WAL File'. Load the shared library or DLL file LIBRARY into SQLite prior to computing the differences. This logic is applied if you join more than 2 tables. In other words, the INNER JOIN clause returns rows from the A table that has the corresponding row in B table. If the value of the f column in the A table equals the value of the f column in the B table, it combines data from a1, a2, b1, b2, columns and includes this row in the result set. INNER JOIN B on B.f = A.f Code language: SQL (Structured Query Language) ( sql )įor each row in the A table, the INNER JOIN clause compares the value of the f column with the value of the f column in the B table.
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