The mysql client typically is used interactively, like this:
shell> mysql db_name
However, it is also possible to put your SQL statements in a
file and then tell mysql to read its input
from that file. To do so, create a text file
text_file
that contains the
statements you wish to execute. Then invoke
mysql as shown here:
shell> mysql db_name
< text_file
If you place a USE
statement as the
first statement in the file, it is unnecessary to specify the
database name on the command line:
db_name
shell> mysql < text_file
If you are already running mysql, you can
execute an SQL script file using the source
command or \.
command:
mysql>source
mysql>file_name
\.
file_name
Sometimes you may want your script to display progress information to the user. For this you can insert statements like this:
SELECT '<info_to_display>' AS ' ';
The statement shown outputs
<info_to_display>
.
You can also invoke mysql with the
--verbose
option, which causes
each statement to be displayed before the result that it
produces.
As of MySQL 5.1.23, mysql ignores Unicode
byte order mark (BOM) characters at the beginning of input
files. Previously, it read them and sent them to the server,
resulting in a syntax error. Presence of a BOM does not cause
mysql to change its default character set. To
do that, invoke mysql with an option such as
--default-character-set=utf8
.
For more information about batch mode, see Section 3.5, “Using mysql in Batch Mode”.
User Comments
To run two sql scripts at a time you can use cat command available in Linux.
cat file1.sql file2.sql | mysql -u USERNAME -p
For windows users, use forward slashes for the path delimiters. You also don't need to enclose the path to the file in quotes. E.g., the following works:
mysql> source C:/Documents and Settings/My name here/My Documents/spike_loadingMySQLDB/createTables.sql;
If you are attempting to use a batch file that is UTF8-encoded (which will handle all your accented latin characters as well as chinese, japanese, etc.), make sure that you start 'mysql' with the '--default-character-set=utf8' option or you will end up with whatever the server default is. If the server default is not utf8, your batch file will most likely produce undesireable results.
We use subversion for both code and MySql database changes (script and data).
1. We have created a file /path/to/script/database.sql that contains the database changes. This file is committed
2. We have a bash script to update both code and executes MySQL changes
The script looks like:
#/bin/bash
svn up <src> <target>
mysql -u <user> -p<password> -h <hostname> <database> < /path/to/updated_script/database.sql
--
If the file database.sql is empty, then nothing is changed.
Enjoy, Theo Theunissen
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