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insert unique name into the table

vikas sharmaa
Ranch Hand

Joined: Jun 28, 2007
Posts: 191
i've an Emp table with empid, name, and loc columns. now, in java, query is written to insert records into Emp table from MyTable as follows:

insert into Emp (empid, name, loc) select myseq.nextval, name, loc from MyTable

in MyTable table, there are duplicate records for name column. So, those duplicate name are getting inserted into the Emp table.

how could i modify the query to insert unique name into the Emp table.
Avi Abrami
Ranch Hand

Joined: Oct 11, 2000
Posts: 1135

Vikas,

Please refer to the Oracle documentation for more details.

Good Luck,
Avi.
vikas sharmaa
Ranch Hand

Joined: Jun 28, 2007
Posts: 191
avi, distinct can be used in simple select sql query.

here if i use, distinct as below:

insert into Emp (empid, name, loc) select myseq.nextval, distinct name, loc from MyTable

it will give sql error.
Campbell Ritchie
Sheriff

Joined: Oct 13, 2005
Posts: 40064
    
  28
You use distinct after "select." If you want the names to be unique (which is probably incorrect; there will be people with the same name as each other), you need to
  • Label the column UNIQUE when you create the table or
  • Use an ALTER TABLE names MODIFY COLUMN . . . instruction.
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