How to get a list of column names on sqlite3 / iPhone?

Question

I want to migrate my iPhone app to a new database version. Since I don't have some version saved, I need to check if certain column names exist.

This Stackoverflow entry suggests doing the select

SELECT sql FROM sqlite_master
WHERE tbl_name = 'table_name' AND type = 'table'

and parse the result.

Is that the common way? Alternatives?

Answer 1

PRAGMA table_info(table_name);

will get you a list of all the column names.

Answer 2

If you have the sqlite database, use the sqlite3 command line program and the commands:
.tables - to list all the tables in the database
.schema tablename - to show the schema for the given table