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1.In a table Gender is a column in that male and female are
the two data.In a single statement i have to modify all male
to female and all female to male vice versa.
2.In a single query i need the count of male data,count of
female and total count
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Answer Posted / anithaletchumi
1.In a table Gender is a column in that male and female are
the two data.In a single statement i have to modify all male
to female and all female to male vice versa.
ans->
update emp_table e set gender = (select case gender
when 'F' then 'M' else 'F' end from emp_table f where
e.empid = f.empid and e.gender=f.gender);
-- empid is the primary key.
2.In a single query i need the count of male data,count of
female and total count
ans 1->
select ( select count(empid) from emp_table where
gender='m' or gender='M') as count_male, ( select count
(empid) from emp11 where gender='f' or gender='F') AS
count_female,( select count(empid) from emp_table) as
tot_count from dual;
ans 2->
select sum(decode(gender,'F',1,'f',1)) as count_female,sum
(decode(gender,'M',1,'m',1)) as count_male,count(*) as
tot_count from emp_table;
| Is This Answer Correct ? | 9 Yes | 3 No |
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