Subtracting From Multiple Rows.
I'm wondering if it's possible to subtract a single value from multiple rows. For example, say I have two rows containing pieces of an account balance, which add up to a total balance. We'll say the two rows hold balances of $10 and $20. Now I want to subtract $25 from them (meaning subtract $20 from one and $5 from the other). Is there a way to write this in one query? If I use the SUM() command can I subtract from the total instead of each unique row?
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