How do i save data from two tables into third table.

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SQL-Server-2014

Am relatively new to this SQL coding, a little help can be useful.
Question:
How do i save consolidated data in third table from tabel1 and table2.

For example:
Table1 contains following column and data.
ID | Name | Target
11 | Abcd | 123
12 | xyzx | 135

Table2 contains following columns and data.
ID | Candidate | Roll_Number
11 | asdeff    | 12345
11 | dfrsf     | 12346
11 | dfesf     | 12347
12 | erfgv     | 12348
12 | dsfdv     | 12349
12 | dasfr     | 12350
12 | dsadsa    | 12351

Table3 should store data from table1 & table2 after applying functions.
Name | Number of Candidate | Target
Abcd | 3                   | 123
xyzx | 4                   | 135

Note: In the third table the "Number of candidate" column should be COUNTED from table2, respectively.

I need a SQL statements which generates above data in table3.

Thanks
Saiekrishna

What I have tried:

I have used JOIN, DISTINCT, COUNT but couldn't get correct data.

Posted 21-Feb-16 22:32pm

Member 10376341

Updated 22-Feb-16 3:09am

v2

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Suvendu Shekhar Giri · Accepted Answer · 2016-02-21T22:55:00

Solution 1

This sounds to be a pretty much straight solution
Something like following should do your job-

SQL

--INSERT INTO Table3
SELECT Table1.Name, COUNT(Table2.ID),Table1.Target
FROM Table2
INNER JOIN Table1 ON Table2.ID=Table1.ID
GROUP BY Table1.Name,Table1.Target

Note: Uncomment the INSERT statement once you are sure about the accuracy of the result from the SELECT statement, to insert the result in to Table3.

Hope, it helps :)

Posted 21-Feb-16 22:55pm

Suvendu Shekhar Giri

Updated 22-Feb-16 3:29am

v2

Comments

CHill60 22-Feb-16 6:40am

You might want to uncomment the line that inserts the data into the table ;)

Suvendu Shekhar Giri 22-Feb-16 9:23am

True. Just kept that commented so that user can see what is going to be inserted.
I always do that to avoid wrong transaction.
But, yes, I should have mentioned that in a note atleast.
Thanks for your suggestion. Will keep that in mind for future answers.

CHill60 22-Feb-16 11:36am

I spotted it because I do exactly the same thing :)

Suvendu Shekhar Giri 23-Feb-16 4:17am

:D great to know that. Thanks :)

Member 10376341 22-Feb-16 7:25am

@Suvendu Shekhar Giri
Thank you for the reply, i have done exactly the way you described but getting an error.
Following is the error:

Msg 208, Level 16, State 1, Line 1
Invalid object name 'Table2'.

Member 10376341 22-Feb-16 8:26am

Error resolved. There were no column name specified in the table3.

A Quick question: What if there is a two similar names with different ID's in the table1. How can i merge the corresponding data?

Example:
Saikrishna: 1245
Saikrishna: 1246

Both names is of a single person but he is associated with two ID's. How can i count his number of candidates.

Any help will be appreciated.

Thanks
Saikrishna

Suvendu Shekhar Giri 22-Feb-16 9:27am

That should not impact the solution if you are using the aggregate (count) function on the distinct column or using (*). Are you facing any problem with the current solution?
If so, please share the sample data so that we can provide an more accurate solution.

Thanks

Member 10376341 22-Feb-16 10:15am

Sure, below is the data generated through your query.

Partner || Candidate ||Total Target
Ramu Naidu Gorle || 55 || 50
Harsha || 50 || 75
Ramu Naidu Gorle || 144 || 100

Well, as you can see the partner name "Ramu Naidu Gorle" is appeared two times but with different candidate and total target. I need those to be sum'd up and resultant should be in a single row.

Example:

Partner || Candidate || Total Target
Ramu Naidu Gorle || 199 || 150
Harsha || 50 || 75

Hope am clear in explaining my stance.