Querying Data From Table

Query data in columns c1, c2 from a table

SELECT c1, c2 FROM t;

Query all rows and columns from a table

SELECT * FROM t;

Query data and filter rows with a condition

SELECT c1, c2 FROM t
WHERE condition;

Query distinct rows from a table

SELECT DISTINCT c1 FROM t
WHERE condition;

Group rows using an aggregate function

SELECT c1, aggregate(c2)
FROM t
GROUP BY c1;

Filter groups using HAVING clause

SELECT c1, aggregate(c2)
FROM t
GROUP BY c1
HAVING condition;