Create table emp
(id number(9), name varchar2(20),salary
number(9,2));
The table has 100 records after table created.Now i nee to
change id's Datatype is to be Varchar2(15). now
Alter table emp modify(id varchar2(15),name varchar2(20),
salary number(9,2));
Whether it will work or returns error? post answer with
explanation.
db2 query
I have one table with the following details.
SNO SNAME DOJ
------ -------------------- ----------
10 KRISH 2007-03-19
20 REDDY 2007-05-19
30 RRRRR 2007-05-19
40 BBBBB 2008-05-19
50 CCCCC 2009-05-19
60 JJJJJ 2009-05-19
70 JJJJJ 2004-05-19
i want the output in the following format:( no of students
joined in each year(no nedd to consider about month and
date)
year count
--------- ----------
2004 1
2007 3
2008 1
2009 2
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