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GNU/Linux Desktop Survival Guide
by Graham Williams
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Basic MySQL


Connect to the local database server as user nhds:



  $ mysql -u nhds -p

Identify the current database:



  mysql> select DATABASE();
  +------------+
  | DATABASE() |
  +------------+
  |            |
  +------------+
  1 row in set (0.00 sec)

List all available databases with:



  mysql> show databases;
  +----------+
  | Database |
  +----------+
  | mysql    |
  | nhds     |
  | test     |
  +----------+
  3 rows in set (0.00 sec)

Select a particular database:



  mysql> use nhds;
  Database changed

List the available tables:



  mysql> show tables;
  +----------------+
  | Tables_in_nhds |
  +----------------+
  | nhds96         |
  | nhds97         |
  | nhds98         |
  | nhds99         |
  +----------------+
  4 rows in set (0.00 sec)

List details of the structure of a table:



  mysql> describe nhds99;
  +---------------+---------+------+-----+---------+-------+
  | Field         | Type    | Null | Key | Default | Extra |
  +---------------+---------+------+-----+---------+-------+
  | svy_year      | int(11) | YES  |     | NULL    |       |
  | newborn       | char(1) | YES  |     | NULL    |       |
  | age_unit      | char(1) | YES  |     | NULL    |       |
  | age           | int(11) | YES  |     | NULL    |       |
  | sex           | char(1) | YES  |     | NULL    |       |
  | race          | char(1) | YES  |     | NULL    |       |
  | m_status      | char(1) | YES  |     | NULL    |       |
  | dis_month     | int(11) | YES  |     | NULL    |       |
  | dis_status    | char(1) | YES  |     | NULL    |       |
  | days_care     | int(11) | YES  |     | NULL    |       |
  | los_flag      | char(1) | YES  |     | NULL    |       |
  | geo_region    | char(1) | YES  |     | NULL    |       |
  | no_beds       | char(1) | YES  |     | NULL    |       |
  | hos_ownership | char(1) | YES  |     | NULL    |       |
  | ana_weight    | int(11) | YES  |     | NULL    |       |
  | dc1           | char(5) | YES  |     | NULL    |       |
  | dc2           | char(5) | YES  |     | NULL    |       |
  | dc3           | char(5) | YES  |     | NULL    |       |
  | dc4           | char(5) | YES  |     | NULL    |       |
  | dc5           | char(5) | YES  |     | NULL    |       |
  | dc6           | char(5) | YES  |     | NULL    |       |
  | dc7           | char(5) | YES  |     | NULL    |       |
  | pc1           | char(4) | YES  |     | NULL    |       |
  | pc2           | char(4) | YES  |     | NULL    |       |
  | pc3           | char(4) | YES  |     | NULL    |       |
  | pc4           | char(4) | YES  |     | NULL    |       |
  | p_src_payment | char(2) | YES  |     | NULL    |       |
  | s_src_payment | char(2) | YES  |     | NULL    |       |
  | drg           | char(3) | YES  |     | NULL    |       |
  +---------------+---------+------+-----+---------+-------+
  29 rows in set (0.00 sec)


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