Queries

Queries#

Table Creation#

CREATE TABLE <table_name> (
    <column_name> <type>,
    ...
    PRIMARY KEY (<columns>)
    FOREIGN KEY (<column>) REFERENCES <table>
);

Update, Delete#

<UPDATE|DELETE FROM> <table>
SET <column> = <value>
WHERE <pred>;

Retrieval Queries#

SELECT [DISTINCT] <column expr>
FROM <table>
[WHERE <pred>]
[GROUP BY <columns>]
[HAVING <pred>]
[ORDER BY <column expr> [DESC|ASC]]
[LIMIT <int>];

Order of Operation#

  1. FROM

  2. WHERE

  3. SELECT

  4. GROUP BY

  5. HAVING

  6. DISTINCT

  7. ORDER BY

  8. LIMIT

Column Expression#

Contents