Archive for the ‘mysql’ Category

Generate SQL queries from Excel document

October 28th, 2011 1 comment

Hi All,
Long time no see, eh?!
That’s what happens when you start working for utilization targets..
When the business needs some Excel to be processed through a database in a certain manner I tend to save lots of time by generating the SQL queries automatically inside the Excel document.
You have an Excel document that depicts table structure inside your database. the Excel document contains the latest updated by the business version of some variables that should be updated inside your database. (Here many of you will ask the logical question, who does stuff in such a rigid and obsolete way? And I have nothing to say in my defense)
What I do is to pickup the important columns that form my query and generate in in a free columns on the right hand side.
="update table_name set colum_name_1="&F2&" where column_name_2='"&A2&"' and column_name_3='"&C2&"';"

For F2=5, A2=STRING1, C2=STRING2 the result will be the following:

update table_name set column_name_1=5 where column_name_2='STRING1' and column_name_3='STRING2';

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Categories: Database, mysql, Oracle Tags:

mysqldump all databases on mysql

February 20th, 2011 2 comments

I was wondering for a few minutes if I can easily backup all databases created by users on a mysql database server. I was trying to automate the process regardless of users creating new databases without my knowledge. I was aware of the convention under which mysql stores the separate databases on the filesystem so I gave it a try.
Fist I tried with few ‘ls’ commands to retrieve the folder names which respectively referred to the database names in the mysql server. On FreeBSD here is the command I used:

[root@bsdbox08 ~]# find /var/db/mysql/ -type d

Here I decided not to mysqldump the mysql database and the performance_schema so I changed the command slightly by adding sed and grep to it.

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Categories: Database, Linux, mysql Tags: