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Possible Duplicate:
ALTER COLUMN in sqlite
I want to change the data type of a column while upgrading.
Any idea how to change the data type of a column.
While using Alter table Alter column statement it is giving a syntax error?
As it is stated in this page
http://www.sqlite.org/lang_altertable.html
Sqlite does not support the
ALTER TABLE ALTER COLUMNsyntax.As I see it you have to store the values of your columns somewhere else, add a new column, rewrite the stored values into the new column, and then drop your old column.