Collection Contents Index Ordering query results Selecting rows from a table pdf/chap12.pdf

First Guide to SQL Anywhere Studio
   PART 3. Basic SQL
     CHAPTER 12. Selecting Data from Database Tables       

Selecting columns from a table


Often, you are only interested in some of the columns in a table. For example, to make up birthday cards for employees you might want to see the emp_lname, dept_id, and birth_date columns.

  List the last name, department, and birthdate of each employee:
  1. Type the following:

    SELECT emp_lname, dept_id, birth_date
    FROM employee

emp_lname

dept_id

birth_date

Whitney

100

1958-06-05

Cobb

100

1960-12-04

Chin

200

1966-10-30

Jordan

300

1951-12-13

Breault

100

1947-05-13

Rearranging columns 

The three columns appear in the order in which you typed them in the SELECT command. If you want to rearrange the columns, simply change the order of the column names in the command. For example, to put the birth_date column on the left, use the following command:

SELECT birth_date, emp_lname , dept_id
FROM employee

Ordering rows 

You can order rows and look at only certain columns at the same time as follows:

SELECT birth_date, emp_lname , dept_id
FROM employee
ORDER BY emp_lname

As you might have guessed, the asterisk in

SELECT * FROM employee

is a short form for all columns in the table.


Collection Contents Index Ordering query results Selecting rows from a table pdf/chap12.pdf