database sql query for matching

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Please help me to write a query of foll scenarion:

i have tow tables in sql, one is "TABLE1" it contains a field "NAMES" thats contains list of names of about 500 persons.

other table is of "TABLE2", one field is "NAMES OF STUDENTS" and other is "GENDER" .

i want to match the names of "Table2" with "TABLE1" and if match is found, than the query will add "male" in gender column.

Posted 5-Jul-11 19:47pm

Db issues

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4 solutions

Solution 2

If I read you correctly, your TABLE1 is a list of males, while TABLE2 is a list of students of both genders, so if table 1 contains the name of a student, then that student is a male and you want to update the column?

Update table2
Set Gender = 'male'
where exists
(
select 1 from table1 where table1.name = table2.name
)

Posted 5-Jul-11 20:36pm

_Maxxx_

Comments

Toniyo Jackson 6-Jul-11 2:41am

Perfect +5

Solution 1

Try this

select *, 'Male' as [Gender] from Table1 inner join Table2 on Table1.Name = Table2.Name

OR

select *, case when Table_2.Name is null then NULL else 'Male' end from Table_1 left join Table_2 on Table_1.Name = Table_2.Name

Posted 5-Jul-11 19:53pm

2irfanshaikh

Updated 5-Jul-11 19:56pm

v2

Solution 6

Thats great Deepthi! thanks. it works but updated only one row
but if we extend solution to %, means Azhar Khan is the full name, but if i have only Azhar in table2, it will match entire name, i want to modify it to 'azhar%'

Posted 6-Jul-11 20:23pm

Db issues

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Deepthi Aravind · Accepted Answer · 2011-07-06T00:58:00

Solution 5

Try this...

 If Exists(select T1.Name from table1 T1 left join table2 T2
       on T1.name=T2.Name)
 begin
 DECLARE @Name varchar(100);
 select @Name= T1.Name from table1 T1 left join table2 T2
    on T1.name=T2.Name
 update table2 set gender='male' where Name=@Name;
end

Posted 6-Jul-11 0:58am

Deepthi Aravind