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mysql is a simple SQL shell (with GNU
readline
capabilities). It supports
interactive and noninteractive use. When used interactively,
query results are presented in an ASCII-table format. When used
noninteractively (for example, as a filter), the result is
presented in tab-separated format. The output format can be
changed using command options.
If you have problems due to insufficient memory for large result
sets, use the --quick
option. This
forces mysql to retrieve results from the
server a row at a time rather than retrieving the entire result
set and buffering it in memory before displaying it. This is
done by returning the result set using the
mysql_use_result()
C API
function in the client/server library rather than
mysql_store_result()
.
Using mysql is very easy. Invoke it from the prompt of your command interpreter as follows:
shell> mysql db_name
Or:
shell> mysql --user=user_name
--password=your_password
db_name
Then type an SQL statement, end it with
“;
”, \g
, or
\G
and press Enter.
You can execute SQL statements in a script file (batch file) like this:
shell> mysql db_name
< script.sql
> output.tab
User Comments
We can create mysql qry files using following the way,
vim /usr/local/bin/mysqlconnect
mysql -uusername -ppassword dbname -hhostname
shell>mysqlconnect
vim /usr/local/bin/mysqlqry
mysql -uusername -ppassword dbname -e "select * from tablename"
shell>mysqlqry
Note that the above shortcuts (such as creating mysqlconnect in linux) will avoid putting the password into the history file, but it is visible in the script itself so ensure the script is NOT world readable. (ie. chmod o-r mysqlconnect)
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