Question

i want my function to generate float numbers ( like : -123.000 , 874.000 ) in range ( like between: 272 and 3357 ) and update every record’s “pos_x” field with unique float numbers.
I write this Code but i see my table’s field are all identical and also integer and they are positive.

this is my code :

UPDATE Driver_tbl
SET pos_x = (ROUND((RAND()* 10000),0))

Answer 1

RAND is evaluated once per query

You can seed it like this though using CHECKSUM(NEWID()) so it is random per row

UPDATE Driver_tbl
SET pos_x = ROUND(RAND(CHECKSUM(NEWID())) * (3357-272),0) + 272

However, you can also cut out the middle man if you are using ROUND(.., 0)

UPDATE Driver_tbl
SET pos_x = ABS(CHECKSUM(NEWID())) % 9999