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SQL PLSQL Interview Questions
Questions Answers Views Company eMail

Why schema is used in sql?

995

Why commit is not used in triggers?

1000

What is compound trigger?

972

What is difference between function and trigger?

985

What version is sql?

975

What is application trigger?

956

What is sql basics?

1002

What are the 3 types of behavioral triggers?

1193

What are sql ddl commands?

1029

Which version of sql do I have?

1006

What is difference between procedure and trigger?

924

How many types of keys are there in sql?

998

How do you modify a trigger?

881

What is the use of desc in sql?

923

What is an emotional trigger?

940


Post New SQL PLSQL Questions

Un-Answered Questions { SQL PLSQL }

what is heap table? : Sql dba

1054


What is primary key and foreign key?

920


What are the two parts of design view?

981


What will you get by the cursor attribute sql%notfound?

1020


Why is %isopen always false for an implicit cursor?

1049


how to get a list of columns in an existing table? : Sql dba

921


How can we optimize a sql query?

994


Hi, I am new in oracle(SQL), could anyone help me in writing a correct SQL. Below is the table structure. Table: Subsc Fields: 1. Sub_no (this field will hold values of subscriber nos, for e.g. S111111, S222222, S333333, S444444, etc.) 2. s_status (this field will hold values for different status of subscriber, for e.g. 'A', 'S', 'C', etc.) 3. cus_id (this field will hold values of bill nos for e.g. 11111111, 22222222, 33333333, 44444444, etc.) Table: Bill Fields: 1. Bill_no this field will hold values of bill nos for e.g. 11111111, 22222222, 33333333, 44444444, etc.) 2. b_status = (this field will hold values for different status of bill for e.g. 'O', 'C', 'S', etc.) Note: 1. The Sub_no is a Primary key of Subsc table. 2. The cus_id is a foreign in Subsc table (referred from Bill_no field of Bill table) 3. The Bill_no field is the Primary key of Bill table. Query A --> I wrote a query to select cus_id/Bill_no which is in status open (b_status = 'O') and having more than two active subscriber (i.e. S_status = 'A') in it ( i.e. more the two subscribers in same bill). select s.cus_id from subsc s where exists (select 1 from bill where bill_no = s.cus_id and b_status = 'O') and s_status = 'A' group by s.cus_id having count(sub_no) = 2 Problem : The above query will give the cus_id (or rather bill_no) which are in open status (b_status ='O) and which are having TWO ACTIVE Subscribers (s_status ='A') in it. However, this query will also lists the cus_id/bill_no which are having more than TWO subscribers in it (but only two subscriber will be in Active status (s_status = 'A') and the others will be in s_status = 'C' or s_status = 'S'. Help needed: I want to write a query which will fetch ONLY the cus_id/bill_no which are in open status (b_status ='O') and which are having ONLY TWO ACTIVE subscribers (s_status ='A') in it. B--> If I include the sub_no in the above query then NO row are returned. select s.cus_id, s.sub_no from subsc s where exists (select 1 from bill where bill_no = s.cus_id and b_status = 'O') and s_status = 'A' group by s.cus_id, s.sub_no having count(sub_no) = 2 Help needed: I want to modify the above query which will fetch ONLY the cus_id/bill_no which are in open status (b_status ='O') and which are having ONLY TWO ACTIVE subscribers (s_status ='A') in it ALONG with the sub_no. Thanks a lot in advance. Regards, Nitin

2298


How can we solve sql error: ora-00904: invalid identifier?

1179


what are the advantages of sql ? : Sql dba

1005


What is compilation error in pl sql?

927


Is sql workbench free?

945


What is %type in pl sql?

930


Can we insert delete data in view?

903


What is AUTH_ID and AUTH_USER in pl/sql ?

2146