i m new in sql. and i want to sum two columns value from different tabales

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i have two table stock and product_order.in first table i having three columns item_code,product_name,stock_on_hand and in second table product_name,product_quan,check_bit.... i want that when the value of check_bit is change 0 to 1 then the stock_on_hand=(stock_on_hand+product_quan) ....what should i do

Posted 3-Oct-12 2:31am

Rashid Choudhary

Updated 3-Oct-12 19:03pm

v3

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bbirajdar 3-Oct-12 9:00am

Write a SQL trigger for update query

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solanki.net · Answer 1 · 2012-10-03T03:03:00

Solution 1

u should try like that :

SQL

select SUM(st.Prd_stock)Stock_Sum,SUM(prd.Prd_qnt)Product_Sum from stock st inner join prodcut prd on st.Prd_Name=prd.Prd_Name and prd.Prd_chk=1

Posted 3-Oct-12 3:03am

solanki.net

Updated 3-Oct-12 4:23am

v2

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Rashid Choudhary 4-Oct-12 1:04am

not work properly

solanki.net 4-Oct-12 1:17am

can u explain what problem r u facing ?

Rashid Choudhary 4-Oct-12 1:23am

my table is
Product_name Product_quan Delivery_date Uname P_id Extend_date st_bit flag check_bit
b 1 2012-08-13 nupur123 135 2012-10-04 1 0 1
c 4 2012-08-22 nupur123 136 2012-10-03 0 0 1
b 1 2012-09-03 priya@21 143 2012-09-27 1 0 0
a 2 2012-08-31 priya@21 144 1900-01-01 0 0 0
c 5 2012-09-18 priya@21 145 1900-01-01 1 0 0
a 1 2012-09-03 nupur123 146 NULL 1 0 0
b 1 2012-09-04 nitin123 148 NULL 1 0 0

and second table is

item_code Product_name stock_on_hand
1 a 4
2 b 5
3 c 8
Reply
Rashid Choudhary - 1 sec ago
and my prob is that when check_bit is change 0 to 1 then in second table automatically
add product_quan with stock_on_hand

solanki.net 4-Oct-12 1:30am

it means finally u want to show sum of these two column ?

Rashid Choudhary 4-Oct-12 1:30am

yes

solanki.net 4-Oct-12 1:37am

declare @Stock int ,@Product int,@Total int
set @Stock=(select SUM(st.Prd_stock) from stock st inner join prodcut prd on st.Prd_Name=prd.Prd_Name and prd.Prd_chk=1)
set @Product=(select SUM(prd.Prd_qnt)Product from prodcut prd inner join stock st on st.Prd_Name=prd.Prd_Name and prd.Prd_chk=1)

set @Total=@Stock + @Product

Rashid Choudhary 4-Oct-12 1:35am

quantity add with stock on hand with same product name

psychic6000 · Answer 2 · 2012-10-03T05:17:00

Solution 2

select SUM(stock_on_hand) + SUM(prd.Prd_product_quan)as total_stock from stock st inner join prodcut prd on stock.product_Name=product.product_Name and product.product_chk=1

Posted 3-Oct-12 5:17am

psychic6000