He came and he saw everything. This is an example of -

♦ He came and he saw everything. This is an example of - Coordinate clause.

• Coordinate clause:
- দুই বা ততোধিক এক জাতীয় clause যখন Coordinating conjunction দ্বারা যুক্ত থাকে তখন তাকে Coordinate clause বলে।

• Each of two or more parts of a sentence, often joined by and, or, but, etc., that make separate statements that each have equal importance in the sentence.
- 'He came and he saw everything.', 'He came' and 'he saw everything' are both coordinate clauses, joined by the word ‘and’.

Source: Advanced Learners by Chowdhury & Hossain, oxfordlearnersdictionaries.com