sqlite alter table unique constraint code example
Example 1: how to drop a unique constraint in sql
SHOW CREATE TABLE [tableName]
-- Find the constraintID after CONSTRAINT 'constraintID'
ALTER TABLE [tableName] DROP FOREIGN KEY constraintID
Example 2: sqlite unique
sqlite uniue
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CREATE TABLE contacts(
contact_id INTEGER PRIMARY KEY,
first_name TEXT,
last_name TEXT,
email TEXT NOT NULL UNIQUE
);