Altering SQLite column type and adding PK constraint

Question

How to change the type of a column in a SQLite table?

I\'ve got:

    CREATE TABLE table(
        id INTEGER,
        salt TEXT NOT NULL UNIQUE,
        s         


        

Answer 1

In this case you can make salt to nullable and remove unique constraint. Also If id column does not contain any null or duplicate values you can safely make it primary key using sql server management studio. below is the screen shot. hope it makes it clearer: alt text http://img265.imageshack.us/img265/7418/91573473.png

or use following sql:

alter table  modify salt text null
alter table  drop constraint 
alter table  modify id int not null
alter table  add constraint pkd primary key (id)

                                                        

              
                
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