Topic: SQL*Plus and PL/SQL >> sql queries
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| jeeva |
Posted: Oct 31, 2007 04:16:59 AM |
Total Post: 11
Joined: Oct, 2007
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create table table1(A number(5),B number(5));
insert into table1(A,B) values(3,7);
insert into table1(A,B) values(1,5);
insert into table1(A,B) values(null,4);
insert into table1(A,B) values(2,6);
1> select * from table1 orderby null;
2> select "*" from table1;
3> select a,count(a) from table1 groupby(a);
4> select 'a'+'b' from table1;
5> select "a"+"b" from table1;
6> select sum(0) from table1;
7> select sum(1) from table1;
8> select sum(null) from table1;
9> select all rows from the table1 using "join" clause
10> select 'b' 'a','a' 'b' from table1 orderby 1;
11> select sum(a+b) from table1;
12> select avg(0) from table1;
can any one give the o/p of each query?.
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 snehalatha |
| Posted: Nov 06, 2007 01:27:25 AM |  |
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Total Post: 169
Joined: Apr, 2006
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1) select * from table1 order by null;
Ans:A constant expression was encountered in the ORDER BY list,
position 1.
2)select "*" from table1;
Ans : * is invalid column
3)select a,count(a) from table1 group by(a);
Ans:
NULL 0
1 1
2 1
3 1
4) select 'a'+'b' from table1;
Ans:
ab
ab
ab
ab
5) select "a"+"b" from table1;
Ans:
10
6
NULL
8
6) select sum(0) from table1;
Ans: 0
7) select sum(1) from table1;
Ans: 1
8) select sum(null) from table1;
Ans: Operand data type void type is invalid for sum operator.
9) select 'b' 'a','a' 'b' from table1 order by 1;
Ans:
b a
b a
b a
b a
10) select sum(a+b) from table1;
Ans:24
11) select avg(0) from table1;
Ans:0
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| jeeva |
| Posted: Nov 06, 2007 08:20:55 AM | |
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Total Post: 11
Joined: Oct, 2007
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Thank u for ur reply
I think i got the correct answer
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