Start Updating an access file using c

Updating an access file using c

If you are looking for a more sophisticated application, then you can look into SQLite official documentation.

Here, the first argument sqlite3 is an open database object, sqlite_callback is a call back for which data is the 1st argument and errmsg will be returned to capture any error raised by the routine.

SQLite3_exec() routine parses and executes every command given in the sql argument until it reaches the end of the string or encounters an error.

In this chapter, you will learn how to use SQLite in C/C programs.

Before you start using SQLite in our C/C programs, you need to make sure that you have SQLite library set up on the machine.

If any queries remain that have not been finalized, sqlite3_close() will return SQLITE_BUSY with the error message Unable to close due to unfinalized statements.

Before proceeding with actual example to fetch records, let us look at some detail about the callback function, which we are using in our examples.

If the filename argument is NULL or ':memory:', sqlite3_open() will create an in-memory database in RAM that lasts only for the duration of the session.

If the filename is not NULL, sqlite3_open() attempts to open the database file by using its value.

Some technologies require you to read and write file data sequentially, while others may allow you to jump around and operate on only part of a file.

Some technologies provide automatic support for reading and writing asynchronously, while others execute synchronously so that you have more control over their execution.

An output stream wakes up the run loop and notifies its delegate when there is space available for writing data.