apagar todos os registos da tabela
DELETE FROM table_name;
SQL riscar o que não interessa.
-- Deletes all records where `columnName` matches the values in brackets.
DELETE FROM tableName WHERE columnName IN ('val1', 'val2', 'val3');
apagar todas as linhas da tabela
-- Quick, no possible rollback
TRUNCATE TABLE my_table;
-- With rollback
DELETE FROM my_table;
COMMIT;