For example, if the query result would have resulted in 55 records and after applying the limit of 10 statements in the select query, only the first 10 records will be retrieved.
(The AS clause is optional.)Ī query can be “ qualified” by adding a WHERE clause that specifies which rows are wanted. Notice how the AS clause is used to relabel the output column.
SELECT city, (temp_hi+temp_lo)/2 AS temp_avg, date FROM weather You can write expressions, not just simple column references, in the select list. SELECT city, temp_lo, temp_hi, prcp, date FROM weather Here * is a shorthand for “ all columns”. For example, to retrieve all the rows of table weather, type: The statement is divided into a select list (the part that lists the columns to be returned), a table list (the part that lists the tables from which to retrieve the data), and an optional qualification (the part that specifies any restrictions). An SQL SELECT statement is used to do this. To retrieve data from a table, the table is queried.