Hi Gurus !
I'm going to some tables with huge amount of records. There are references between
these tables. The
question is:
Does it worth creating a procedure with several small selects or is it faster to use
one select with
joins?
For example:
CUSTOMER(CUST_ID);
CONTRACT(CONTR_ID,CUST_ID);
CONTRACT_ITEM(CONTR_I_ID,CONTR_ID,PHONE_NUM_ID);
PHONE_NUMBER(PHONE_NUM_ID,PHONE_NUM);
I have the PHONE_NUM and I need the CUST_ID.
Which Faster?
SELECT CUST_ID from PHONE_NUM,CONTRACT_ITEM,CONTRACT,CUSTOMER where .... [JOINS] and
PHONE_NUM=searchedone
or In procedure or function
select phone_num_id into Variable from phone where phone_num=searchedone;
select contract_id into Variable2 from contract_item where phone_num_id=Variable;
select cust_id into Variable from contract where contr_id=Variable2;
Thanks in advance.
Gyula
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Author: Andor Gyula
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