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<table border="1">
  <tbody>
  <tr>
    <td align="middle" bgcolor="#aaaaaa" colspan="2"><font size="3"><b>Handy MySQL 
      Commands</b></font> </td></tr>
  <tr>
    <td><b>Description</b></td>
    <td><b>Command</b></td></tr>
  <tr>
    <td>To login (from unix shell) use -h only if needed.</td>
    <td>[mysql dir]/bin/mysql -h hostname -u root -p</td></tr>
  <tr>
    <td>Create a database on the sql server.</td>
    <td>create database [databasename];</td></tr>
  <tr>
    <td>List all databases on the sql server.</td>
    <td>show databases;</td></tr>
  <tr>
    <td>Switch to a database.</td>
    <td>use [db name];</td></tr>
  <tr>
    <td>To see all the tables in the db.</td>
    <td>show tables;</td></tr>
  <tr>
    <td>To see database's field formats.</td>
    <td>describe [table name];</td></tr>
  <tr>
    <td>To delete a db.</td>
    <td>drop database [database name];</td></tr>
  <tr>
    <td>To delete a table.</td>
    <td>drop table [table name];</td></tr>
  <tr>
    <td>Show all data in a table.</td>
    <td>SELECT * FROM [table name];</td></tr>
  <tr>
    <td>Returns the columns and column information pertaining to the 
      designated table.</td>
    <td>show columns from [table name];
    </td><td>
  </td></tr><tr>
  </tr><tr>
    <td>Show certain selected rows with the value "whatever".</td>
    <td>SELECT * FROM [table name] WHERE [field name] = "whatever";
    </td><td>
  </td></tr><tr>
  </tr><tr>
    <td>Show all records containing the name "Bob" AND the phone number 
      '3444444'.</td>
    <td>SELECT * FROM [table name] WHERE name = "Bob" AND phone_number = 
      '3444444';
    </td><td>
  </td></tr><tr>
  </tr><tr>
    <td>Show all records not containing the name "Bob" AND the phone number 
      '3444444' order by the phone_number field.</td>
    <td>SELECT * FROM [table name] WHERE name != "Bob" AND phone_number = 
      '3444444' order by phone_number;
    </td><td>
  </td></tr><tr>
  </tr><tr>
    <td>Show all records starting with the letters 'bob' AND the phone number 
      '3444444'.</td>
    <td>SELECT * FROM [table name] WHERE name like "Bob%" AND phone_number = 
      '3444444';
    </td><td>
  </td></tr><tr>
  </tr><tr>
    <td>Use a regular expression to find records. Use "REGEXP BINARY" to force 
      case-sensitivity. This finds any record beginning with a. </td>
    <td>SELECT * FROM [table name] WHERE rec RLIKE "^a$";
    </td><td>
  </td></tr><tr>
  </tr><tr>
    <td>Show unique records.</td>
    <td>SELECT DISTINCT [column name] FROM [table name];</td></tr>
  <tr>
    <td>Show selected records sorted in an ascending (asc) or descending 
      (desc).</td>
    <td>SELECT [col1],[col2] FROM [table name] ORDER BY [col2] DESC;</td></tr>
  <tr>
    <td>Count rows.</td>
    <td>SELECT COUNT(*) FROM [table name];
    </td><td>
  </td></tr><tr>
  </tr><tr>
    <td>Join tables on common columns.</td>
    <td>select lookup.illustrationid, lookup.personid,person.birthday from 
      lookup<br>left join person on lookup.personid=person.personid=statement to 
      join birthday in person table with primary illustration id;</td></tr>
  <tr>
    <td>Switch to the mysql db. Create a new user.
    </td><td>INSERT INTO [table name] (Host,User,Password) 
      VALUES('%','user',PASSWORD('password'));</td></tr>
  <tr>
    <td>Change a users password.(from unix shell).</td>
    <td>[mysql dir]/bin/mysqladmin -u root -h hostname.blah.org -p password 
      'new-password'</td></tr>
  <tr>
    <td>Change a users password.(from MySQL prompt).</td>
    <td>SET PASSWORD FOR 'user'@'hostname' = PASSWORD('passwordhere');</td></tr>
  <tr>
    <td>Switch to mysql db.Give user privilages for a db.</td>
    <td>INSERT INTO [table name] 
      (Host,Db,User,Select_priv,Insert_priv,Update_priv,Delete_priv,Create_priv,Drop_priv) 
      VALUES ('%','db','user','Y','Y','Y','Y','Y','N');</td></tr>
  <tr>
    <td>To update info already in a table.</td>
    <td>UPDATE [table name] SET Select_priv = 'Y',Insert_priv = 
      'Y',Update_priv = 'Y' where [field name] = 'user';</td></tr>
  <tr>
    <td>Delete a row(s) from a table.</td>
    <td>DELETE from [table name] where [field name] = 'whatever';</td></tr>
  <tr>
    <td>Update database permissions/privilages.</td>
    <td>FLUSH PRIVILEGES;</td></tr>
  <tr>
    <td>Delete a column.</td>
    <td>alter table [table name] drop column [column name];</td></tr>
  <tr>
    <td>Add a new column to db.</td>
    <td>alter table [table name] add column [new column name] varchar 
  (20);</td></tr>
  <tr>
    <td>Change column name.</td>
    <td>alter table [table name] change [old column name] [new column name] 
      varchar (50);</td></tr>
  <tr>
    <td>Make a unique column so you get no dupes.</td>
    <td>alter table [table name] add unique ([column name]);</td></tr>
  <tr>
    <td>Make a column bigger.</td>
    <td>alter table [table name] modify [column name] VARCHAR(3);</td></tr>
  <tr>
    <td>Delete unique from table.</td>
    <td>alter table [table name] drop index [colmn name];</td></tr>
  <tr>
    <td>Load a CSV file into a table.</td>
    <td>LOAD DATA INFILE '/tmp/filename.csv' replace INTO TABLE [table name] 
      FIELDS TERMINATED BY ',' LINES TERMINATED BY '\n' 
    (field1,field2,field3);</td></tr>
  <tr>
    <td>Dump all databases for backup. Backup file is sql commands to recreate 
      all db's.</td>
    <td>[mysql dir]/bin/mysqldump -u root -ppassword --opt 
      &gt;/tmp/alldatabases.sql</td></tr>
  <tr>
    <td>Dump one database for backup.</td>
    <td>[mysql dir]/bin/mysqldump -u username -ppassword --databases 
      databasename &gt;/tmp/databasename.sql</td></tr>
  <tr>
    <td>Dump a table from a database.</td>
    <td>[mysql dir]/bin/mysqldump -c -u username -ppassword databasename 
      tablename &gt; /tmp/databasename.tablename.sql</td></tr>
  <tr>
    <td>Restore database (or database table) from backup.</td>
    <td>[mysql dir]/bin/mysql -u username -ppassword databasename &lt; 
      /tmp/databasename.sql </td></tr>
  <tr>
    <td>Create Table Example 1.</td>
    <td>CREATE TABLE [table name] (firstname VARCHAR(20), middleinitial 
      VARCHAR(3), lastname VARCHAR(35),suffix VARCHAR(3),<br>officeid 
      VARCHAR(10),userid VARCHAR(15),username VARCHAR(8),email VARCHAR(35),phone 
      VARCHAR(25), groups <br>VARCHAR(15),datestamp DATE,timestamp time,pgpemail 
      VARCHAR(255)); </td></tr>
  <tr>
    <td>Create Table Example 2.</td>
    <td>create table [table name] (personid int(50) not null auto_increment 
      primary key,firstname varchar(35),middlename varchar(50),lastname 
      varchar(50) default 'bato'); </td></tr></tbody></table>
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