MySQL Database Analytics with InfiniDB from Calpont – Part
Let's be honest: working with big databases is a lot of fun. There's something cool about dealing with tables that have hundreds of millions or billions of rows in them, loading huge amounts of data, building star and snowflake schemas for data warehouses/marts, optimizing query performance, and all that jazz. Yes, working with big databases is a lot of fun.On the other hand, let's be honest: working with big databases is not a lot of fun. There's a lot of pain in dealing with tables that have hundreds of millions or billions of rows in them, waiting for huge amounts of data to be loaded only to have the load job toss its cookies and fail when it's 99% done, building special schemas that you wonder whether make any difference at all, and trying to figure out why just a simple two-way join query has been hanging for over an hour. Yes, working with big databases is not a lot of fun.
Hi guys, I would like to seek help on inserting data whenever the switch is on or off to my sensor mySQL database in phpMyAdmin from my control.php. I'm using Raspberry PI as my hardware and follow a few tutorials to create my own Web Control Interface, it works perfectly without insert method.... (1 Reply)
Dear All,
Can I make Mailx to read recipient address from a mysql database?
I already tried emailing with bash script:
SUBJECT="TEST"
export EMAIL_ADDRESS=`mysql -uroot -pabcde smsd -e "SELECT email FROM recipient"`
mysql -uroot -pabcde smsd -e "SELECT ID, SenderName, Body FROM inbox" |... (2 Replies)
Hi all,
I am trying to import a database in putty with the syntax:
mysql –u database_username –p database_name < filename.mysql
As you can see in the screenshot it asks me for the database password - which suggests that the syntax is correct - but then after I enter the password it gives... (2 Replies)
so when i issue a command like the below:
# mysql --pager=/usr/bin/less -u cactiman -p -e 'select * from data_input' cacti
Enter password: ... (2 Replies)
Hi All,
Thanks in Advance!!
How to backup a particular Databases..through Bash script!!
For example i have 6 databases;
Anish
linux
Software
Questions
Rhce
Google
these are the databases i have from that i want to take "Anish" and "questions" database backup regularly.... (4 Replies)
MYSQLDUMP(1) General Commands Manual MYSQLDUMP(1)NAME
mysqldump - text-based client for dumping or backing up mysql databases , tables and or data.
USAGE
mysqldump [OPTIONS] database [tables]
OR mysqldump [OPTIONS] --databases [OPTIONS] DB1 [DB2 DB3...]
OR mysqldump [OPTIONS] --all-databases [OPTIONS]
OPTION SYNOPSIS
mysqldump [-A|--all-databases] [-a|--all] [-#|--debug=...] [--character-sets-dir=...] [-?|--help] [-B|--databases] [-c|--complete-insert]
[-C|--compress] [--default-character-set=...] [-e|--extended-insert] [--add-drop-table] [--add-locks] [--allow-keywords] [--delayed-
insert] [-F|--flush-logs] [-f|--force] [-h|--host=...] [-l|--lock-tables] [-n|--no-create-db] [-t|--no-create-info] [-d|--no-data]
[-O|--set-variablevar=option] [--opt] [-p|--password[=...]] [-P|--port=...] [-q|--quick] [-Q|--quote-names] [-S|--socket=...] [--tables]
[-T|--tab=...] [-u|--user=#] [-v|--verbose] [-V|--version] [-w|--where=] [--delayed] [-e|--extended-insert] [--fields-terminated-by=...]
[--fields-enclosed-by=...] [--fields-optionally-enclosed-by=...] [--fields-escaped-by=...] [--lines-terminated-by=...] [-v|--verbose]
[-V|--version] [-O net_buffer_length=#, where # < 16M]
DESCRIPTION
Dumping definition and data mysql database or table mysqldump supports by executing
-A|--all-databases
Dump all the databases. This will be same as --databases with all databases selected.
-a|--all
Include all MySQL specific create options.
-#|--debug=...
Output debug log. Often this is 'd:t:o,filename`.
--character-sets-dir=...
Directory where character sets are
-?|--help
Display this help message and exit.
-B|--databases
To dump several databases. Note the difference in usage; In this case no tables are given. All name arguments are regarded as
databasenames.
-c|--complete-insert
Use complete insert statements.
-C|--compress
Use compression in server/client protocol.
--default-character-set=...
Set the default character set
-e|--extended-insert
Allows utilization of the new, much faster INSERT syntax.
--add-drop-table
Add a 'drop table' before each create.
--add-locks
Add locks around insert statements.
--allow-keywords
Allow creation of column names that are keywords.
--delayed-insert
Insert rows with INSERT DELAYED.
-F|--flush-logs
Flush logs file in server before starting dump.
-f|--force
Continue even if we get an sql-error.
-h|--host=...
Connect to host.
-l|--lock-tables
Lock all tables for read.
-n|--no-create-db
will not be put in the output. The above line will be added otherwise, if --databases or --all-databases option was given.
-t|--no-create-info
Don't write table creation info.
-d|--no-data
No row information.
-O|--set-variable var=option
give a variable a value. --help lists variables
--opt Same as --add-drop-table --add-locks --all --extended-insert --quick --lock-tables
-p|--password[=...]
Password to use when connecting to server. If password is not given it's solicited on the tty.
-P|--port=...
Port number to use for connection.
-q|--quick
Don't buffer query, dump directly to stdout.
-Q|--quote-names
Quote table and column names with `
-S|--socket=...
Socket file to use for connection.
--tables
Overrides option --databases(-B).
-T|--tab=...
Creates tab separated textfile for each table to given path. (creates .sql and .txt files). NOTE: This only works if mysqldump is
run on the same machine as the mysqld daemon.
-u|--user=#
User for login if not current user.
-v|--verbose
Print info about the various stages.
-V|--version
Output version information and exit.
-w|--where=
dump only selected records; QUOTES mandatory!
--delayed
Insert rows with the INSERT DELAYED command.
-e|--extended-insert
Use the new multiline INSERT syntax. (Gives more compact and faster inserts statements.)
--fields-terminated-by=...
--fields-enclosed-by=...
--fields-optionally-enclosed-by=...
--fields-escaped-by=...
--lines-terminated-by=...
These options are used with the -T option and have the same meaning as the corresponding clauses for LOAD DATA INFILE. See Mysql
manual section 7.23 LOAD DATA INFILE Syntax.
-v|--verbose
Verbose mode. Print out more information on what the program does.
-V|--version
Print version information and exit.
-O net_buffer_length=#, where # < 16M
When creating multi-row-insert statements (as with option --extended-insert or --opt ), mysqldump will create rows up to net_buf-
fer_length length. If you increase this variable, you should also ensure that the max_allowed_packet variable in the MySQL server is
bigger than the net_buffer_length.
EXAMPLES
The most normal use of mysqldump is probably for making a backup of whole databases. See Mysql Manual section 21.2 Database Backups.
mysqldump --opt database > backup-file.sql
You can read this back into MySQL with:
mysql database < backup-file.sql
or
mysql -e 'source /patch-to-backup/backup-file.sql' database
However, it's also very useful to populate another MySQL server with information from a database:
mysqldump --opt database | mysql --host=remote-host -C database
It is possible to dump several databases with one command:
mysqldump --databases database1 [ database2 database3... ] > my_databases.sql
If all the databases are wanted, one can use:
mysqldump --all-databases > all_databases.sql
SEE ALSO
isamchk (1), isamlog (1), mysqlaccess (1), mysqladmin (1), mysqlbug (1), mysqld (1), mysqldump (1), mysqlshow (1), msql2mysql (1), perror
(1), replace (1), safe_mysqld (1), which1 (1), zap (1),
AUTHOR
Ver 1.0, distribution 3.23.29a Michael (Monty) Widenius (monty@tcx.se), TCX Datakonsult AB (http://www.tcx.se). This software comes with
no warranty. Manual page by L. (Kill-9) Pedersen (kill-9@kill-9.dk), Mercurmedia Data Model Architect / system developer (http://www.mer-
curmedia.com)
19 December 2000 MYSQLDUMP(1)
