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Question

1 GAVEN THE FOLLOWING TABLES
SUPPLIER(SUPPLIER_ID,SUPPLIER_NAME,CITY); PK(SUPPLIER_ID)
SUPPLIER_ID-------|--SUPPLIER_NAME
1-----------------------|-- IBM
2-----------------------|-- AT&T
3-----------------------|-- GE
PARTS(PART_ID,PART_NAME,COLOR); PK(PART_ID)
PART_ID----------| PART_NAME-------------| COLOR
1--------------------|-COMPUTER---------------| RED
2--------------------| CALCULATOR------------| GREEN
SUPPLIER_PART(SUPPLIER_ID,PART_ID,QTY), PK(SUPPLIER_ID,PART_ID)
SUPPLIER_ID---| PART_ID---| QTY
1-------------------| 1--------------| 30
1-------------------| 2--------------| 50
2-------------------| 1--------------| 20
write SELECT statements to obtain results of following
1 get supplier who dose not supply any part.
2 get supplier who supplies only one part.
3 get supplier who supplies all parts.
4 get supplier who supplies the maximum quantity of part 1.
5 get the total quantity supplied of each part.
according the question no . i create database package contain.
1 function to get supplier who dose not supply any part.
2 function to get supplier who supplies only one part.
3 function to get supplier who supplies all parts.
4 function to get supplier who supplies the maximum quantity of part 1.
5 function to get the total quantity supplied of each part.
3 write two triggers that fire on each of form-level,block-level,record-level and item-level
explain briefly each trigger.
4 write down the name of the trigger that can be used to activate the close button at the top of the window
(note close button appears on the title bar of any window on MS WINDOWS PLATFORM as (x)).
5 if i need a trigger that fires on each navigation of records?....Ex...need to show and hide some items
depending on a condition in the record what will be that trigger?
6 if i need to check the uniqueness of the primary key not on commit but when entering the value of the
primary key state the triggers that will be used and the code you will write in each trigger?take into
consideration that this value might not been saved yet in the database ,this means it's on block and not
yet committed.
7 if you have a record group whose query changes depending on the data block record what built-in function
will be used?
8 if i need to change a property on item not in the whole records but in the current record
depending - assuming that we have a toolbar layout -on a condition in the record.what procedure will you used?
9 write a database function that accepts column name and table name as parameters and returns the MAX value
in the column.
function xxx(p_column_name varchar2,p_table_name)
what if you need to do the same function in forms builder,what package should you use?
10 assume that you have a table say
emp(empno number(10),ename varchar2(50))
the table contains the the following data
empno--|---- ename
1----------|-------ali
2----------|------hassan
begin
select ename into ename
from emp
where empno=empno
end;
what would be the value of the variable ename after the execution of the above code?
do you expect any errors to arise from the above code?
11 assume you have two tables
table t1(t_id number(10)) with a check constraint t_id>0
table t2(cnt number(10)) with only one row record in it initialized to 0
now suppose we have a trigger on t1
declare
v_cnt number(15);
begin
select nvl(cnt,0)
into v_cnt
from t2;
v_cnt:=v_cnt+1;
update t2 set cnt=v_cnt;
end;
examine the code below and tell what would be the value of cnt in table t2
after execution of the following cases separately.
end;
please indicate the value of cnt after execution of above code (first case)
(second case)
begin
insert into t1 values(3);
insert into t1 values(-1);
exception
when others then
null;
end;
please indicate the value of cnt after execution of above code (second case)
12 we need a query which display the following output form tables emp,dept
dept 10
emp1
emp2
dept 20
emp3
emp4
meaning first display the department then displays the employee belonging to this
department (using hierarchical retneval) indicate the level on each row as a column
of the result.
13 suppose you have the following results
1234 12341234fadf<hello>123423 dfa
write the statement to extract the text after the <hello> tag(note.: the number of characters of
the whole string is unknown one thing for sure,it contains<hello>)
14 what is the oracle supplied package responsible for writing on text files on the
database what is the other package used on forms for the same purpose
Edited by: user11721244 on Jul 22, 2009 1:21 PM

Answer 1

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