How to list out check constraints in a SQLite table

Question

for example I defined a table

create table demo_tab (
    name text not null unique,
    phone_number text not null check(phone_number like \'9%\')
);


        

Answer 1

You can retrieve the SQL that was used to create the table from sqlite_master:

sqlite> create table demo_tab (
   ...>     name text not null unique,
   ...>     phone_number text not null check(phone_number like '9%')
   ...> );
sqlite> select sql from sqlite_master where type='table' and name='demo_tab';
CREATE TABLE demo_tab (
    name text not null unique,
    phone_number text not null check(phone_number like '9%')
)