How to solve the problem of database?

In practical work, we encounter this kind of problem , For example, the batch lock function , The same order type , Different serial numbers , Operate a storage location at the same time , adopt for Loop to operate , for the first time for loop , Don't order 5101, Order number 202206060946, Order No 0001, The first time you query, you get CS-ZD-001 Storehouse , The available inventory quantity of the location is 800, Then subtract it for the first time 800, be left over 0, And the location status is changed to Y Occupy , But for the second time for When the loop queries again , Or get the current one CS-ZD-001 Location of , Because it is attached to the transaction , He did not submit to the database , Is there any good logic or method to solve it , I hope the second query is CS-ZD-001 The available inventory quantity of is 0, And the state changes to Y, So you won't get