sqlite insert if not exists
#id column is assumed to be primary key
INSERT INTO destination_table(id,name)
SELECT id, name
FROM source_table s
WHERE NOT EXISTS (
SELECT 1
FROM destination_table d
WHERE d.id = s.id
);sqlite insert if not exists
#id column is assumed to be primary key
INSERT INTO destination_table(id,name)
SELECT id, name
FROM source_table s
WHERE NOT EXISTS (
SELECT 1
FROM destination_table d
WHERE d.id = s.id
);sqlite update where exists
UPDATE employees
SET hire_date = (SELECT departments.start_date
FROM departments
WHERE departments.department_id = employees.department_id
AND departments.department_name = 'HR')
WHERE EXISTS (SELECT *
FROM departments
WHERE departments.department_id = employees.department_id
AND departments.department_name ='HR');Copyright © 2021 Codeinu
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