What is the meaning of sqlite3 connect memory?

How do I connect to SQLite memory?

The most common way to force an SQLite database to exist purely in memory is to open the database using the special filename ":memory:". In other words, instead of passing the name of a real disk file into one of the sqlite3_open(), sqlite3_open16(), or sqlite3_open_v2() functions, pass in the string ":memory:".

What is memory in sqlite3?

SQLite in-memory databases are databases stored entirely in memory, not on disk. Use the special data source filename :memory: to create an in-memory database. When the connection is closed, the database is deleted. When using :memory: , each connection creates its own database.

How do I connect to a memory database?

ATTACH DATABASE ':memory:' AS aux1; Note that in order for the special ":memory:" name to apply and to create a pure in-memory database, there must be no additional text in the filename. Thus, a disk-based database can be created in a file by prepending a pathname, like this: "./:memory:".

How much memory does SQLite need?

SQLite will refuse to allocate more than about 2GB of memory at one go. (In common use, SQLite seldom ever allocates more than about 8KB of memory at a time so a 2GB allocation limit is not a burden.) So the 64-bit size parameter provides lots of headroom for detecting overflows.