Q&A Discussions

What is the difference in performance when using the full name and just the name of the column?

8th Jan 2016, 1:50 AM

Nana Qhuacy

0 Votes

What's main difference btwn union and join?

4th Jan 2016, 9:15 PM

Liliya Ibragimova

join sql union

3 Votes

6 Answers

2nd Jan 2016, 6:17 PM

shanmukh

What is ment by alias in sql?

0 Votes

27th Dec 2015, 3:36 AM

Sadeepa Lakshan

Why use primary key?

0 Votes

What's the difference between sql and mysql?

25th Dec 2015, 9:57 AM

Dileep kumar

Where can I download SQL IDE?

0 Votes

7 Answers

23rd Dec 2015, 3:56 AM

Hemalata Samavedula

0 Votes

Can we use this Select salary From employees Where salary>AVG(salary);?

22nd Dec 2015, 4:09 AM

Gamoo

sql subqueries

1 Vote

12 Answers

21st Nov 2015, 7:32 AM

Akash Potdar

Could multiple rows be updated?

sql update

1 Vote

could somebody tell me if mysql is better than sql?

19th Nov 2015, 10:50 AM

Akash Potdar

mysql sql

0 Votes

What's the difference between UNION and JOIN?

13th Nov 2015, 2:11 PM

braym chavez

join sql union

1 Vote

7 Answers

12th Nov 2015, 10:17 AM

Sukanya

Can I use the command "show databases" in my sql?

0 Votes

Is there a way to reverse what you update/delete?

4th Nov 2015, 8:53 AM

Shashank Bhagat

delete sql update

0 Votes

5 Answers

26th Oct 2015, 8:42 PM

Yair Tapia

How do I build a database for a social network for education purposes?

0 Votes

Can we use twice AND operator in single query?

9th Oct 2015, 12:41 PM

Oze Ezeanochie

sql where

1 Vote

9 Answers

29th Sep 2015, 6:59 PM

Sukriti Kumari Mishra

Custom Columns: does the colum get added to the original table?

0 Votes

What is the difference between UNIQUE and PRIMARY KEY?

29th Sep 2015, 3:21 PM

Akshay Dhingra

sql tables

1 Vote

hi there. I have noticed that in the lesson you didn't gave the int datatype a size parameter. Does it mean that int parameter can hold lby default any integer no matter how many characters it consists of?

27th Sep 2015, 7:54 AM

Lina

sql tables

0 Votes

I have single table called flow, which has every 10 mins flow sample. I want to show sum of this samples per shift like 8am to 4pm shift1, 4pm to 12am shift2, 12am to 8am shift3

24th Sep 2015, 8:35 AM

George Shtalman

sql union

0 Votes

What are Boolean Literals?

22nd Aug 2015, 5:12 AM

hari Prasad

0 Votes

18th Aug 2015, 6:59 PM

Sagnik Mukherjee

How to delete a columns?

0 Votes

How custom column name generated?

22nd Jul 2015, 1:24 PM

jibon jesmin

functions sql

0 Votes

concat() will take only 2 arguments, concat(city,', ',state) is not working in Oracle. How did you get solution with it please clarify my doubt.

18th Jul 2015, 2:10 PM

Rahul Sounder

concat sql

0 Votes

hi, can u tell how many columns a table can have?

14th Jun 2015, 5:20 PM

gnani

0 Votes