Database Archives - Page 3 of 44

I have table name called “Person” with following column names P_Id(int), LastName(varchar), FirstName (varchar). I forgot to give NOT NULL Constraint to P_Id. ...

June 2, 2022
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MySQL, Programming

IT Nursery

How to find out the MySQL root password

I cannot figure out my MySQL root password; how can I find this out? Is there any file where this password is stored? ...

June 2, 2022
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MySQL, Programming

IT Nursery

If table exists drop table then create it, if it does not exist just create it

I’m stumped, I don’t know how to go about doing this. Basically I just want to create a table, but if it exists ...

June 2, 2022
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MySQL, Programming

IT Nursery

What does it mean by select 1 from table?

I have seen many queries with something as follows. Select 1 From table What does this 1 mean, how will it be executed ...

June 2, 2022
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Database, Programming

IT Nursery

What is the difference between a schema and a table and a database?

This is probably a n00blike (or worse) question. But I’ve always viewed a schema as a table definition in a database. This is ...

June 2, 2022
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