other ways to build apps

... Editors Baron Schwartz Morgan Tocker Nicklas Westerlund Vice President and Executive Publisher Barry Pruett Production Editor Liz Britten Copy Editors Kim Cofer Foxxe Editorial Services Editorial ... Stored Routines .255 Performance implications of stored routines 256 Stored procedures vs stored functions 256 Creating a stored routine 256 Invoking a stored ... MyISAM storage engine 378 InnoDB storage engine 384 MEMORY storage engine 394 Maria storage engine 396 Falcon storage engine 401 PBXT storage...

Ngày tải lên: 21/01/2014, 13:20

... sales_by_film_category.category sales_by_film_category.total_sales mysql> sa sales_by_store sales_by_store.manager sales_by_store.store sales_by_store.total_sales You can continue to use tab completion Continuing ... these GUI tools, first you will need to make a connection to mysqld It is common to use the ssh protocol to establish secure connections One of the reasons SQLyog stands out among other tools is ... start and stop it manually and toggle whether it starts and stops automatically when Windows starts and stops The graphical Services utility can be found in Control Panel Administrative Tools on...

Ngày tải lên: 21/01/2014, 13:20

... administrators expect it to behave in the following ways: ■ Storage engines — Each table is an instantiation of a storage engine Different tables can have different storage engines Different storage ... Execute button to store it on the server You can also examine and edit stored procedures and functions that are already created To this just click Script on the menu bar and select Edit All Stored ... Administrator allows you to control service creation and automatically creates, installs, and configures services through the service control screen You can even use MySQL Administrator to start and stop...

Ngày tải lên: 21/01/2014, 13:20

... the SELECT INTO OUTFILE so you should make sure to save a copy of the table definition for restoration of the file The SELECT INTO DUMPFILE command works similarly to the SELECT INTO OUTFILE command ... table For more information about storage engines, see Chapter 11 ■ INDEX DIRECTORY=’path _to_ dir’ — MyISAM tables will store their MYI files in the path _to_ dir directory This option is ignored for ... automatically reclaimed When InnoDB is used and mysqld is set to use innodb_file_per_table, table data and indexes are stored in a ibd file in the data directory All table metadata is stored together...

Ngày tải lên: 21/01/2014, 13:20

... stored in base 2, as opposed to decimal format, which is stored in base 10) Unlike other data types, a BIT value needs to be converted upon retrieval to produce a human-readable result How to ... –32,768 to 32,767 to 65,535 bytes MEDIUMINT –8,388,608 to 8,388,607 to 16,777,215 bytes INT –2,147,483,648 to 2,147,483,647 to 4,294,967,295 bytes BIGINT –9,223,372,036,854,775,808 to 9,223,372,036,854,775,807 ... types into this category BLOB values The four BLOB types are very similar to each other — the only differences are the maximum amount of data each can store and the overhead involved in storing...

Ngày tải lên: 21/01/2014, 13:20

... was changed to y, has reverted to l AUTOCOMMIT The use of the AUTOCOMMIT statement is another way to work with transactions rather than the more traditional START TRANSACTION or BEGIN To a transactional ... from one partition to another takes time to copy the file from one partition to another and then delete the original file ■ There are security considerations for giving a directory its own partition ... production Two other characteristics of file systems that are important to database administrators is the ability to work with large file sizes and to provide support for a large number of directories...

Ngày tải lên: 21/01/2014, 22:20

... the adjust-monitor-adjust cycle, and once your system is at the right level, continue to monitor levels, making sure to check performance once every month or two Make sure to always leave a buffer ... MySQL Server allows a storage engine to be able to create or drop indexes without copying the contents of the entire table However, a storage engine has to write the code to implement this functionality ... Split-Merge on www.verypdf.com to remove this watermark Storage Engines for every situation Using multiple storage engines allows you to fit the storage engine to the requirements of any particular...

Ngày tải lên: 21/01/2014, 22:20

... the today field) and the total count of visitors up to today (in the vcount field) With each new visitor, update the visitors_today.count field: UPDATE visitors_today SET today = today + 1; To retrieve ... Calculates and stores the total running count in visitors_today.vcount ■ Resets the vistors_today.today field to zero Here is a sample event that updates the current and historic visitor count tables: ... INTO visitors_stored (vcount, vcount_date) SELECT today, CURRENT_DATE() - INTERVAL DAY FROM visitors_today; UPDATE visitors_today set today=0, vcount=( SELECT SUM(vcount) as vcount FROM visitors_stored);...

Ngày tải lên: 21/01/2014, 22:20

... either stop-datetime=’YYYY-MM-DD’ or stop-position=# To determine the exact position to start or stop you have to examine the binary log contents The problem is that this can be a large file To start ... very easy to pipe the output to a file and then store the file in a version control system or use just simply copy it to another server and use the file to set up the same permissions on another server ... servers to host similar types of data For example, customers with IDs less than 500,000 are stored in the customers table on server1, and customers with IDs greater than or equal to 500,000 are stored...

Ngày tải lên: 21/01/2014, 22:20

... slave to be a new master and want to change other slaves to stop replicating the old master and start replicating the new master (see Chapter 22 for examples of slave promotion) To this, log in to ... to be a slave of another master This allows you to build some fairly complicated replication topologies MySQL replication is asynchronous This means that the master does not wait for slaves to ... # Server A auto_incremenent_increment = 10 auto_increment_offset = # Server B auto_incremenent_increment = 10 auto_increment_offset = # Server C auto_incremenent_increment = 10 auto_increment_offset...

Ngày tải lên: 21/01/2014, 22:20

... tool can take into consideration the specifics of your system, and what is acceptable to your users There is a tradeoff to using automated tools, which may be acceptable Even if you use an automated ... need to update many indexes, table fragmentation, and statistics calculation Other Query Analysis Tools While EXPLAIN is the most widely used tool to analyze queries, it is not comprehensive Other ... necessary to wait for the dirty pages to be flushed This number should be low when compared to the total read numbers InnoDB Lock Waits 0/s Current Time acquiring Total ms...

Ngày tải lên: 21/01/2014, 22:20

... users are expected to seeing up -to- the-second current results, so try to train your customers to expect recent, but not necessarily up -to- the-second, results If there is resistance to changing user ... needs to back up; however, there is no need for a backup user to be able to bulk load data or execute stored routines related to the application A monitoring application that only needs to connect ... different ways to store SQL code Events, views, stored routines, and triggers can be used to allow very specific actions to be taken without giving more granular permissions For example, using a stored...

Ngày tải lên: 21/01/2014, 22:20

... able to handle stale connections, or have the ability to automatically reconnect a disconnected connection memcached Without a doubt, the fastest way to get data is to not have to connect to mysqld ... setting up db2 to be a slave of db1 In addition, some extra parameters need to be set to ensure data integrity: ■ auto_increment_offset ■ auto_increment_increment Having writes to more than one ... requires mysql-proxy to be restarted Automated failover The mysql-proxy process can be used to automate failover To this, there must be a failover server that is active (able to be used without...

Ngày tải lên: 21/01/2014, 22:20

... was changed to y, has reverted to l AUTOCOMMIT The use of the AUTOCOMMIT statement is another way to work with transactions rather than the more traditional START TRANSACTION or BEGIN To a transactional ... from one partition to another takes time to copy the file from one partition to another and then delete the original file ■ There are security considerations for giving a directory its own partition ... production Two other characteristics of file systems that are important to database administrators is the ability to work with large file sizes and to provide support for a large number of directories...

Ngày tải lên: 26/01/2014, 11:20

... the adjust-monitor-adjust cycle, and once your system is at the right level, continue to monitor levels, making sure to check performance once every month or two Make sure to always leave a buffer ... MySQL Server allows a storage engine to be able to create or drop indexes without copying the contents of the entire table However, a storage engine has to write the code to implement this functionality ... Split-Merge on www.verypdf.com to remove this watermark Storage Engines for every situation Using multiple storage engines allows you to fit the storage engine to the requirements of any particular...

Ngày tải lên: 26/01/2014, 11:20

... the today field) and the total count of visitors up to today (in the vcount field) With each new visitor, update the visitors_today.count field: UPDATE visitors_today SET today = today + 1; To retrieve ... Calculates and stores the total running count in visitors_today.vcount ■ Resets the vistors_today.today field to zero Here is a sample event that updates the current and historic visitor count tables: ... INTO visitors_stored (vcount, vcount_date) SELECT today, CURRENT_DATE() - INTERVAL DAY FROM visitors_today; UPDATE visitors_today set today=0, vcount=( SELECT SUM(vcount) as vcount FROM visitors_stored);...

Ngày tải lên: 26/01/2014, 11:20