Week 0 - Querying
Week 0 - Querying
- SELECT
- LIMIT
- WHERE
- =, >, <, >=, <=, != <>, NOT
- AND
- OR
- ()
- IS NULL, IS NOT NULL
- LIKE, %, _
- BETWEEN ... AND ...
- ORDER BY ... ASC / DESC
- Aggregate functions:
- COUNT
- AVG
- MIN
- MAX
- SUM
- DISTINCT
Week 1 - Relating
Week 1 - Relating
- Relationships:
- One to one.
- One to many.
- Many to many.
- Subqueries.
- Joins.
- INNER, LEFT, RIGHT, FULL
- NATURAL JOIN
- Sets.
- UNION
- INTERESCT
- EXCEPT
- Groups.
- GROUP BY
- HAVING