The sqlite3_open() C API function is used to open a connection to the database and is held in a single operating system file. This function actually opens the file, and thus, a secure connection is made that is not shared. If the memory option is used, then the database will be created in random access memory (RAM), once the connection is established. The database will then be removed and deleted from RAM when the connection closed.
SQLite will attempt to open an existing database, and if an entered database name does not exist, then it will assume that the programmer wants to create one. SQLite is clever if you want to create a database and then close it without any operation, such as creating a table: it will not actually spend resources creating the database, only an empty file will exist:
sqlite3 aFile.db "create table aTable(field1 int); drop table aTable;"
The preceding statement will create the required default file with a table and will then drop/delete it, leaving...