single database vs multiple databases

[Radhakant Samal]

I want to know which type of database designing helps in better performance.

suppose there is a main organization under which several organization are working.

the functioning of every child organization is same. so the er modeling is same

for all. so in this case i want to know, should i go for separate tables for

every
child organization. Table structure and no of tables in the database is same for

every child organization,but the data is different for every child organization.

So should i maintain separate set of tables for each child organization. Or

should i have a single table which contains all the data of all the child

organization, and they all will be identified by any unique key. so while

retrieving we can filter them by this key. So i want to know which one is better.

Group of same tables for each child organization or a single table for all this.

Which will come good on performance. kindly reply earlier.

Please reply why no one is replying ? Is the information not sufficient ?