Is it possible to check if a (MySQL) database exists after having made a connection.

I know how to check if a table exists in a DB, but I need to check if the DB exists. If not I have to call another piece of code to create it and populate it.

I know this all sounds somewhat inelegant – this is a quick and dirty app.

The MySQL EXISTS condition is used in combination with a subquery and is considered to be met if the subquery returns at least one row. Statement that usually starts with SELECT. rather than a list of expressions or column names.

If you just need to know if a db exists so you won’t get an error when you try to create it, simply use (From here):

A simple way to check if a database exists is:

If database with the name ‘dbname’ doesn’t exist, you get an empty set. If it does exist, you get one row.

From the shell like bash

another best way of checking if a dabtabse exists is:

That is the method that i always use to check if database exists….

Here is a bash function for checking if a database exists:

Another alternative is to just try to use the database. Note that this checks permission as well:

For those who use php with mysqli then this is my solution. I know the answer has already been answered, but I thought it would be helpful to have the answer as a mysqli prepared statement too. Sarah e o pato dublado download youtube.

If you are using MSSQL instead of MySQL, see this answer from a similar thread.

Long winded and convoluted (but bear with me!), here is a class system I made to check if a DB exists and also to create the tables required:

In this you can replace the database name en with any database name you like and also change the creator script to anything at all and (hopefully!) it won’t break it. If anyone can improve this, let me know!

Note
If you don’t use Visual Studio with PHP tools, don’t worry about the regions, they are they for code folding 😛

Rails Code:

=> entos_development exist , entos_development1 not exist

Following solution worked for me:

I am using simply the following query:

Microsoft office 2003 free download for windows 7 64 bit with crack windows. Then check if the result is FALSE.
Otherwise, there might be an access denied error, but I cannot know that.
So, in case of privileges involved, one can use:

as already mentioned earlier.

Tags: database, mysql, sql