Table of Contents for
MySQL in a Nutshell, 2nd Edition
MySQL in a Nutshell, 2nd Edition
Published by
O'Reilly Media, Inc., 2008
- Cover
- MySQL in a Nutshell
- MySQL in a Nutshell
- Dedication
- Preface
- The Purpose of This Book
- How This Book Is Organized
- Conventions Used in This Book
- Using Code Examples
- Request for Comments
- Safari® Enabled
- Acknowledgments
- I. Introduction and Tutorials
- 1. Introduction to MySQL
- The Value of MySQL
- The MySQL Package
- Licensing
- Mailing Lists
- Books and Other Publications
- 2. Installing MySQL
- Choosing a Distribution
- Unix Source Distributions
- Unix Binary Distributions
- Linux RPM Distributions
- Macintosh OS X Distributions
- Novell NetWare Distributions
- Windows Distributions
- Postinstallation
- 3. MySQL Basics
- The mysql Client
- Creating a Database and Tables
- Show Me
- Inserting Data
- Selecting Data
- Ordering, Limiting, and Grouping
- Analyzing and Manipulating Data
- Changing Data
- Deleting Data
- Searching Data
- Importing Data in Bulk
- Command-Line Interface
- Conclusion
- II. SQL Statements and Functions
- 4. Security and User Statements and Functions
- Statements and Functions
- SQL Statements in Alphabetical Order
- CREATE USER
- DROP USER
- FLUSH
- GRANT
- RENAME USER
- RESET
- REVOKE
- SET PASSWORD
- SHOW GRANTS
- SHOW PRIVILEGES
- Functions in Alphabetical Order
- AES_DECRYPT()
- AES_ENCRYPT()
- CURRENT_USER()
- DECODE()
- DES_DECRYPT()
- DES_ENCRYPT()
- ENCODE()
- ENCRYPT()
- MD5()
- OLD_PASSWORD()
- PASSWORD()
- SESSION_USER()
- SHA()
- SHA1()
- SYSTEM_USER()
- USER()
- 5. Database and Table Schema Statements
- Statements and Clauses in Alphabetical Order
- ALTER DATABASE
- ALTER SCHEMA
- ALTER SERVER
- ALTER TABLE
- ALTER VIEW
- CREATE DATABASE
- CREATE INDEX
- CREATE SCHEMA
- CREATE SERVER
- CREATE TABLE
- CREATE VIEW
- DESCRIBE
- DROP DATABASE
- DROP INDEX
- DROP SERVER
- DROP TABLE
- DROP VIEW
- RENAME DATABASE
- RENAME TABLE
- SHOW CHARACTER SET
- SHOW COLLATION
- SHOW COLUMNS
- SHOW CREATE DATABASE
- SHOW CREATE TABLE
- SHOW CREATE VIEW
- SHOW DATABASES
- SHOW INDEXES
- SHOW SCHEMAS
- SHOW TABLE STATUS
- SHOW TABLES
- SHOW VIEWS
- 6. Data Manipulation Statements and Functions
- Statements and Functions Grouped by Characteristics
- Statements and Clauses in Alphabetical Order
- BEGIN
- COMMIT
- DELETE
- DO
- EXPLAIN
- HANDLER
- HELP
- INSERT
- JOIN
- LIMIT
- LOAD DATA INFILE
- RELEASE SAVEPOINT
- REPLACE
- ROLLBACK
- ROLLBACK TO SAVEPOINT
- SAVEPOINT
- SELECT
- SET
- SET TRANSACTION
- SHOW ERRORS
- SHOW WARNINGS
- START TRANSACTION
- TRUNCATE
- UNION
- UPDATE
- USE
- XA
- Functions in Alphabetical Order
- ANALYSE()
- BENCHMARK()
- DATABASE()
- FOUND_ROWS()
- LAST_INSERT_ID()
- ROW_COUNT()
- SCHEMA()
- 7. Table and Server Administration Statements and Functions
- Statements and Clauses in Alphabetical Order
- ALTER SERVER
- ANALYZE TABLE
- BACKUP TABLE
- CACHE INDEX
- CHECK TABLE
- CHECKSUM TABLE
- CREATE SERVER
- FLUSH
- KILL
- LOAD INDEX INTO CACHE
- LOCK TABLES
- OPTIMIZE TABLE
- REPAIR TABLE
- RESET
- RESTORE TABLE
- SET
- SHOW ENGINE
- SHOW ENGINES
- SHOW OPEN TABLES
- SHOW PLUGINS
- SHOW PROCESSLIST
- SHOW STATUS
- SHOW TABLE STATUS
- SHOW VARIABLES
- UNLOCK TABLES
- Functions in Alphabetical Order
- CONNECTION_ID()
- GET_LOCK()
- IS_FREE_LOCK()
- IS_USED_LOCK()
- RELEASE_LOCK()
- UUID()
- VERSION()
- 8. Replication Statements and Functions
- Merits of Replication
- Replication Process
- The Replication User Account
- Configuring the Servers
- Copying Databases and Starting Replication
- Starting Replication
- Backups with Replication
- SQL Statements and Functions in Alphabetical Order
- CHANGE MASTER TO
- LOAD DATA FROM MASTER
- LOAD TABLE...FROM MASTER
- MASTER_POS_WAIT()
- PURGE MASTER LOGS
- RESET MASTER
- RESET SLAVE
- SET GLOBAL SQL_SLAVE_SKIP_COUNTER
- SET SQL_LOG_BIN
- SHOW BINLOG EVENTS
- SHOW BINARY LOGS
- SHOW MASTER LOGS
- SHOW MASTER STATUS
- SHOW SLAVE HOSTS
- SHOW SLAVE STATUS
- START SLAVE
- STOP SLAVE
- Replication States
- 9. Stored Routines Statements
- Statements in Alphabetical Order
- ALTER EVENT
- ALTER FUNCTION
- ALTER PROCEDURE
- ALTER TRIGGER
- BEGIN...END
- CALL
- CLOSE
- CREATE EVENT
- CREATE FUNCTION
- CREATE PROCEDURE
- CREATE TRIGGER
- DECLARE
- DELIMITER
- DROP EVENT
- DROP FUNCTION
- DROP PREPARE
- DROP PROCEDURE
- DROP TRIGGER
- EXECUTE
- FETCH
- OPEN
- PREPARE
- SHOW CREATE EVENT
- SHOW CREATE FUNCTION
- SHOW CREATE PROCEDURE
- SHOW EVENTS
- SHOW FUNCTION CODE
- SHOW FUNCTION STATUS
- SHOW PROCEDURE CODE
- SHOW PROCEDURE STATUS
- SHOW TRIGGERS
- 10. Aggregate Clauses, Aggregate Functions, and Subqueries
- Aggregate Functions in Alphabetical Order
- AVG()
- BIT_AND()
- BIT_OR()
- BIT_XOR()
- COUNT()
- GROUP_CONCAT()
- MAX()
- MIN()
- STD()
- STDDEV()
- STDDEV_POP()
- STDDEV_SAMP()
- SUM()
- VAR_POP()
- VAR_SAMP()
- VARIANCE()
- Subqueries
- 11. String Functions
- String Functions Grouped by Type
- String Functions in Alphabetical Order
- ASCII()
- BIN()
- BINARY
- BIT_LENGTH()
- CAST()
- CHAR()
- CHAR_LENGTH()
- CHARACTER_LENGTH()
- CHARSET()
- COALESCE()
- COERCIBILITY()
- COLLATION()
- COMPRESS()
- CONCAT()
- CONCAT_WS()
- CONVERT()
- CRC32()
- ELT()
- EXPORT_SET()
- FIELD()
- FIND_IN_SET()
- HEX()
- INSERT()
- INSTR()
- INTERVAL()
- LCASE()
- LEFT()
- LENGTH()
- LOAD_FILE()
- LOCATE()
- LOWER()
- LPAD()
- LTRIM()
- MAKE_SET()
- MATCH() AGAINST()
- MID()
- OCTET_LENGTH()
- ORD()
- POSITION()
- QUOTE()
- REPEAT()
- REPLACE()
- REVERSE()
- RIGHT()
- RPAD()
- RTRIM()
- SOUNDEX()
- SPACE()
- STRCMP()
- SUBSTR()
- SUBSTRING()
- SUBSTRING_INDEX()
- TRIM()
- UCASE()
- UNCOMPRESS()
- UNCOMPRESSED_LENGTH()
- UNHEX()
- UPPER()
- 12. Date and Time Functions
- Date and Time Functions Grouped by Type
- Date and Time Functions in Alphabetical Order
- ADDDATE()
- ADDTIME()
- CONVERT_TZ()
- CURDATE()
- CURRENT_DATE()
- CURRENT_TIME()
- CURRENT_TIMESTAMP()
- CURTIME()
- DATE()
- DATE_ADD()
- DATE_FORMAT()
- DATE_SUB()
- DATEDIFF()
- DAY()
- DAYNAME()
- DAYOFMONTH()
- DAYOFWEEK()
- DAYOFYEAR()
- EXTRACT()
- FROM_DAYS()
- FROM_UNIXTIME()
- GET_FORMAT()
- HOUR()
- LAST_DAY()
- LOCALTIME()
- LOCALTIMESTAMP()
- MAKEDATE()
- MAKETIME()
- MICROSECOND()
- MINUTE()
- MONTH()
- MONTHNAME()
- NOW()
- PERIOD_ADD()
- PERIOD_DIFF()
- QUARTER()
- SEC_TO_TIME()
- SECOND()
- SLEEP()
- STR_TO_DATE()
- SUBDATE()
- SUBTIME()
- SYSDATE()
- TIME()
- TIME_FORMAT()
- TIME_TO_SEC()
- TIMEDIFF()
- TIMESTAMP()
- TIMESTAMPADD()
- TIMESTAMPDIFF()
- TO_DAYS()
- UNIX_TIMESTAMP()
- UTC_DATE()
- UTC_TIME()
- UTC_TIMESTAMP()
- WEEK()
- WEEKDAY()
- WEEKOFYEAR()
- YEAR()
- YEARWEEK()
- 13. Mathematical Functions
- Functions in Alphabetical Order
- ABS()
- ACOS()
- ASIN()
- ATAN()
- ATAN2()
- BIT_COUNT()
- CEIL()
- CEILING()
- CONV()
- COS()
- COT()
- DEGREES()
- EXP()
- FLOOR()
- FORMAT()
- GREATEST()
- INET_ATON()
- INET_NTOA()
- LEAST()
- LN()
- LOG()
- LOG2()
- LOG10()
- MOD()
- OCT()
- PI()
- POW()
- POWER()
- RADIANS()
- RAND()
- ROUND()
- SIGN()
- SIN()
- SQRT()
- TAN()
- TRUNCATE()
- 14. Flow Control Functions
- Functions in Alphabetical Order
- CASE
- IF()
- IFNULL()
- ISNULL()
- NULLIF()
- III. MySQL Server and Client Tools
- 15. MySQL Server and Client
- mysql Client
- mysql
- mysqld Server
- mysqld
- mysqld_multi
- mysqld_multi
- mysqld_safe
- mysqld_safe
- 16. Command-Line Utilities
- comp_err
- make_binary_distribution
- msql2mysql
- my_print_defaults
- myisam_ftdump
- myisamchk
- myisamlog
- myisampack
- mysql_convert_table_format
- mysql_find_rows
- mysql_fix_extensions
- mysql_fix_privilege_tables
- mysql_setpermission
- mysql_tableinfo
- mysql_upgrade
- mysql_waitpid
- mysql_zap
- mysqlaccess
- mysqladmin
- mysqlbinlog
- mysqlbug
- mysqlcheck
- mysqldump
- mysqldumpslow
- mysqlhotcopy
- mysqlimport
- mysqlshow
- mysqlslap
- perror
- replace
- resolveip
- resolve_stack_dump
- IV. APIs and Connectors
- 17. C API
- Using C with MySQL
- Functions in Alphabetical Order
- mysql_affected_rows()
- mysql_autocommit()
- mysql_change_user()
- mysql_character_set_name()
- mysql_close()
- mysql_commit()
- mysql_connect()
- mysql_create_db()
- mysql_data_seek()
- mysql_debug()
- mysql_drop_db()
- mysql_dump_debug_info()
- mysql_eof()
- mysql_errno()
- mysql_error()
- mysql_escape_string()
- mysql_fetch_field()
- mysql_fetch_field_direct()
- mysql_fetch_fields()
- mysql_fetch_lengths()
- mysql_fetch_row()
- mysql_field_count()
- mysql_field_seek()
- mysql_field_tell()
- mysql_free_result()
- mysql_get_client_info()
- mysql_get_character_set_info()
- mysql_get_client_version()
- mysql_get_host_info()
- mysql_get_proto_info()
- mysql_get_server_info()
- mysql_get_server_version()
- mysql_get_ssl_cipher()
- mysql_hex_string()
- mysql_info()
- mysql_init()
- mysql_insert_id()
- mysql_kill()
- mysql_library_end()
- mysql_library_init()
- mysql_list_dbs()
- mysql_list_fields()
- mysql_list_processes()
- mysql_list_tables()
- mysql_more_results()
- mysql_next_result()
- mysql_num_fields()
- mysql_num_rows()
- mysql_options()
- mysql_ping()
- mysql_query()
- mysql_real_connect()
- mysql_real_escape_string()
- mysql_real_query()
- mysql_reload()
- mysql_refresh()
- mysql_rollback()
- mysql_row_seek()
- mysql_row_tell()
- mysql_select_db()
- mysql_set_character_set()
- mysql_set_local_infile_default()
- mysql_set_local_infile_handler()
- mysql_set_server_option()
- mysql_shutdown()
- mysql_sqlstate()
- mysql_ssl_set()
- mysql_stat()
- mysql_store_result()
- mysql_thread_end()
- mysql_thread_id()
- mysql_thread_init()
- mysql_thread_safe()
- mysql_use_result()
- mysql_warning_count()
- C API Datatypes
- 18. Perl API
- Using Perl DBI with MySQL
- Perl DBI Reference
- available_drivers()
- begin_work()
- bind_col()
- bind_columns()
- bind_param()
- bind_param_array()
- bind_param_inout()
- can()
- clone()
- column_info()
- commit()
- connect()
- connect_cached()
- data_diff()
- data_sources()
- data_string_desc()
- data_string_diff()
- disconnect()
- do()
- dump_results()
- err()
- errstr()
- execute()
- execute_array()
- execute_for_fetch()
- fetch()
- fetchall_arrayref()
- fetchall_hashref()
- fetchrow_array()
- fetchrow_arrayref()
- fetchrow_hashref()
- finish()
- foreign_key_info()
- func()
- get_info()
- installed_drivers()
- installed_versions()
- last_insert_id()
- looks_like_number()
- neat()
- neat_list()
- parse_dsn()
- parse_trace_flag()
- parse_trace_flags()
- ping()
- prepare()
- prepare_cached()
- primary_key()
- primary_key_info()
- private_attribute_info()
- quote()
- quote_identifier()
- rollback()
- rows()
- selectall_arrayref()
- selectall_hashref()
- selectcol_arrayref()
- selectrow_array()
- selectrow_arrayref()
- selectrow_hashref()
- set_err()
- state()
- statistics_info()
- swap_inner_handle()
- table_info()
- tables()
- take_imp_data()
- trace()
- trace_msg()
- type_info()
- type_info_all()
- Attributes for Handles
- 19. PHP API
- Using PHP with MySQL
- PHP MySQL Functions in Alphabetical Order
- mysql_affected_rows()
- mysql_change_user()
- mysql_client_encoding()
- mysql_close()
- mysql_connect()
- mysql_create_db()
- mysql_data_seek()
- mysql_db_name()
- mysql_db_query()
- mysql_drop_db()
- mysql_errno()
- mysql_error()
- mysql_escape_string()
- mysql_fetch_array()
- mysql_fetch_assoc()
- mysql_fetch_field()
- mysql_fetch_lengths()
- mysql_fetch_object()
- mysql_fetch_row()
- mysql_field_flags()
- mysql_field_len()
- mysql_field_name()
- mysql_field_seek()
- mysql_field_table()
- mysql_field_type()
- mysql_free_result()
- mysql_get_client_info()
- mysql_get_host_info()
- mysql_get_proto_info()
- mysql_get_server_info()
- mysql_info()
- mysql_insert_id()
- mysql_list_dbs()
- mysql_list_fields()
- mysql_list_processes()
- mysql_list_tables()
- mysql_num_fields()
- mysql_num_rows()
- mysql_pconnect()
- mysql_ping()
- mysql_query()
- mysql_real_escape_string()
- mysql_result()
- mysql_select_db()
- mysql_set_charset()
- mysql_stat()
- mysql_tablename()
- mysql_thread_id()
- mysql_unbuffered_query()
- V. Appendixes
- A. Data Types
- Numeric Data Types
- BIT
- TINYINT
- BOOL, BOOLEAN
- SMALLINT
- MEDIUMINT
- INT, INTEGER
- BIGINT, SERIAL
- FLOAT
- DOUBLE, DOUBLE PRECISION
- DEC, DECIMAL, FIXED, NUMERIC
- Date and Time Data Types
- String Data Types
- CHAR
- VARCHAR
- BINARY
- VARBINARY
- TINYBLOB
- TINYTEXT
- BLOB
- TEXT
- MEDIUMBLOB
- MEDIUMTEXT
- LONGBLOB
- LONGTEXT
- ENUM
- SET
- B. Operators
- Arithmetic Operators
- Relational Operators
- Logical Operators
- Bitwise Operators
- Regular Expressions
- C. Server and Environment Variables
- Index
- About the Author
- Colophon
- Copyright
Name
RELEASE_LOCK()
Synopsis
RELEASE_LOCK(string)This function releases a lock created by GET_LOCK(). The name of the lock is given in parentheses. If successful, 1 is returned; if unsuccessful, 0 is returned. If the lock specified does not exist, NULL is returned. Here is an example:
SELECT RELEASE_LOCK('my_lock');
+-------------------------+
| RELEASE_LOCK('my_lock') |
+-------------------------+
| 1 |
+-------------------------+As an alternative to using SELECT, you can use the
DO statement. In this case, no results are returned, but the lock is
released:
DO RELEASE_LOCK('my_lock');