How to find missing accounts in SQL .can you please tell me. I am new to this sql.can anyone help me.

Question

1.00/5 (1 vote)

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I am doing work on revenues some taccounts missing in that.

What I have tried:

In table I need to check that accounts are missing.

SQL

select count (*) from CTInterface

I tried this query getting 85 accounts but

SQL

select count (*) from revenues where accttype='ct'

getting only 73 accounts.

I need to find the 12 missing accounts in table

Posted 7-Oct-20 21:01pm

mounika mouni

Updated 7-Oct-20 22:09pm

Richard Deeming

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Comments

Sandeep Mewara 8-Oct-20 3:02am

It's far too less information to have a concrete answer here. What accounts, whats missing, what is the table structure, what query you wrote and struggling with?

mounika mouni 8-Oct-20 3:13am

hI sandeep,
in table i need to check that accounts are missing.
select count (*) from CTInterface i tried this query getting 85 accounts
but select count (*) from revenues where accttype='ct' getting only 73 accounts.

i need to find the 12 missing accounts in table

Richard MacCutchan 8-Oct-20 3:46am

If you can extract all the accounts and you can extract the set with 'ct' (whatever that means) then it is a simple matter to compare the two sets to see which are the missing ones.

mounika mouni 8-Oct-20 5:02am

can you plz explain briefly how to extract

from CTInterface getting 85 ROWS and from revenues tables getting 73 ROWS .need to find misiing columns

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Richard Deeming · Answer 1 · 2020-10-07T21:52:00

Solution 1

Try:

SQL

SELECT *
FROM CTInterface As A
WHERE Not Exists
(
    SELECT 1
    FROM revenues As R
    WHERE R.accttype='ct'
    AND R.ACCOUNTNUMBERCOLUMNHERE = A.ACCOUNTNUMBERCOLUMNHERE
)

You will need to replace the ACCOUNTNUMBERCOLUMNHERE column names with the correct column names from your tables.

Posted 7-Oct-20 21:52pm

Richard Deeming

Comments

Maciej Los 8-Oct-20 4:10am

5ed!

Maciej Los · Answer 2 · 2020-10-07T22:10:00

If i understand you well, you want to get entries from CTInterface table which have no related data in revenues table. You need to use LEFT JOIN.

SQL

select cti.*
from CTInterface cti LEFT JOIN revenues rev ON cti.<PrimaryKey> = rev.<ForeignKey> 
WHERE rev.accttype IS NULL

For further details, please see: Visual Representation of SQL Joins[^]

Note: you have to replace value between <...> with proper field name.