Learning MySQL

By Hugh E. Williams, Seyed M.M. Tahaghoghi

Whether you are operating a enterprise, maintaining a tally of individuals andmeetings for a membership, or simply attempting to arrange a wide and diversecollection of knowledge, you will discover the MySQL database engineuseful for answering questions such as:

  • that are my most sensible ten fastest-selling products?
  • How usually does this individual come to our facility?
  • What used to be the top, lowest, and usual rating of the staff final season?

MySQL, the most well-liked open-source database, deals the facility ofa relational database in a package deal that is effortless to establish andadminister, and Learning MySQL offers the entire instruments you wish toget began. This densely packed instructional comprises detailedinstructions that can assist you manage and layout an efficient database,create strong queries utilizing SQL, configure MySQL for improvedsecurity, and squeeze details from your information.

After masking the fundamentals, the publication travels some distance into MySQL'ssubtleties, together with complicated queries and joins, the right way to have interaction withthe database over the net utilizing personal home page or Perl, and importanthouse-keeping equivalent to backups and security.

Topic include:

  • set up on Linux, home windows, and Mac OS X
  • Basic and complex querying utilizing SQL
  • User administration and security
  • Backups and recovery
  • Tuning for stronger efficiency
  • Developing command-line and net database functions utilizing thePHP and Perl programming languages

The authors, Saied Tahaghoghi and Hugh E. Williams, have careers inacademia and company, and percentage a willing curiosity in examine intosearch technologies.

Whether you have by no means touched a database or have already completedsome MySQL tasks, you will find insights in Learning MySQLthat will final a career.

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Create/append broader person privileges for an current database and host mixture (user can do SELECT,INSERT,UPDATE,DELETE) five. Create/append relatively prolonged consumer privileges for an current database and host mix (user can do SELECT,INSERT,UPDATE,DELETE,CREATE,DROP,INDEX, LOCK TABLES,CREATE transitority TABLES) 6. Create/append database administrative privileges for an current database and host blend (user can do SELECT,INSERT,UPDATE,DELETE,CREATE,DROP,INDEX,LOCK TABLES, CREATE transitority TABLES,SHOW DATABASES,PROCESS) 7.

Every one row exhibits a privilege, via an outline, after which an inventory of the 4 degrees at which the privilege might be granted. for instance, the second one row exhibits the adjust privilege that controls no matter if the regulate desk assertion can be utilized, and indicates that it may be managed on the worldwide, database, and desk degrees: international point you should use ON *. * in a provide assertion to supply a consumer a selected privilege throughout all databases at the server. Database point you should use, for instance, tune. * to provide a privilege for a number of databases.

01 sec) To load the Animals hash into the Animals desk within the database, we will be able to create and execute an SQL question for every animal identify and count number pair: whereas ((my $Animal, my $Count) = each(%Animals)) { my $Query="INSERT INTO Animals (Name, count number) VALUES ($Animal, $Count)"; my $sth=$dbh->prepare($Query); $sth->execute($Animal, $Count); } This calls for us to organize as many queries as there are information rows, that's inefficient. a greater method is to organize a unmarried question with placeholders and execute the question in flip with the various parameters: my $Query="INSERT INTO Animals (Name, count number) VALUES (?

Connection=@mysqli_connect ($DB_hostname, $DB_username, $DB_password, $DB_databasename))) die("Failed whereas attempting to connect with the database. "); the following, we’ve used the personal home page die() functionality to reveal an mistakes message and forestall this system if mysqli_connect() returns fake. It’s universal to suppress the default Hypertext Preprocessor blunders messages by way of including the at image (@) ahead of the decision to MySQL features; with out it, you’ll get either a message from PHP’s personal blunders handler, that's cryptic to a consumer, and your message from the die() functionality.

Command | Time | country | information | ... +---------+------+-------+------------------+ ... | Sleep | 1 | | | ... | question | zero | | convey processlist | ... +---------+------+-------+------------------+ 2 rows in set (0. 00 sec) The output in all fairness self-explanatory, and info are within the “SHOW syntax” element of the MySQL guide. The mysqladmin processlist command produces an identical output: $ mysqladmin --user=root --password=the_mysql_root_password processlist +-------+------------+-----------------------------+--------+...

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