Using Same Value from Select Statement in an Insert Query

Question

I have an insert command with values are calculated based on currency value on another table. Sql code is something like

INSERT INTO table1 (column1,column2,column3,column4,column5,column6)
VALUES
(
value1 * (SELECT currency FROM currency_table WHERE date=date1),
value2 * (SELECT currency FROM currency_table WHERE date=date1),
value3 * (SELECT currency FROM currency_table WHERE date=date1),
value4 * (SELECT currency FROM currency_table WHERE date=date2),
value5 * (SELECT currency FROM currency_table WHERE date=date2),
value6 * (SELECT currency FROM currency_table WHERE date=date2),
)

UPDATE table1 
SET column1 = value7 * (SELECT currency FROM currency_table WHERE date=date1),
column2 = value8 * (SELECT currency FROM currency_table WHERE date=date1),
column3 = value9 * (SELECT currency FROM currency_table WHERE date=date1),
column4 = value10 * (SELECT currency FROM currency_table WHERE date=date2),
column5 = value11 * (SELECT currency FROM currency_table WHERE date=date2),
column6 = value12 * (SELECT currency FROM currency_table WHERE date=date2)
WHERE column7 = value13

So i get currency values 3 times. Consider this is an example becaue my actual query has this with 10 calls.

How can i change this query to get Currency value not 3 times but only 1 time.

Consider currency_table has only 1 row.

Forgot to mention this query is for sql server 2008

Answer 1

Insert is ok with what Guneli has provided. Syntactically, the query is incorrect. Use

INSERT INTO table1 (column1,column2,column3,column4,column5,column6)
SELECT value1*currency1, value2*currency1, value3*currency1,
       value4*currency2, value5*currency2, value6*currency2
FROM (select (select currency from currency_table where date = @date1) currency1,
(select currency from currency_table where date = @date2) currency2) A;

For update, you can use the following command.

UPDATE t1 
SET t1.column1 = value1 * c.currency1,
t1.column2 = value2 * c.currency1,
t1.column3 = value3 * c.currency1,
t1.Column4 = value4 * c.currency2,
t1.column5 = value5 * c.currency2,
t1.column6 = value6 * c.currency2
from table1 t1, 
(select (select currency from currency_table where date = @date1) currency1, 
   (select currency from currency_table where date = @date2) currency2) C
WHERE t1.column4 = value4

It will make a cross join with currency_table, and assuming currency_table is having single row, it will update correctly.

Answer 2

Try this for INSERT:

INSERT INTO table1 (column1,column2,column3)
VALUES
SELECT value1*currency, value2*currency, value3*currency
FROM currency_table;

Answer 3

What about a join? I am not sure on the condition as you select currency without any where clause.

UPDATE table1 t1 INNER JOIN currency_table c ON [condition??]
SET t1.column1 = value1 * c.currency,
t1.column2 = value2 * c.currency,
t1.column3 = value3 * c.currency,
WHERE t1.column4 = value4