In SQL, say I have a table of the following layout:
id name age
1 george 12
2 tom 14
3 charles 19
4 henry 21
5 fiona 12
6 kate 14
...
If I discover that I've made a terrible inputting mistake, and that everybody is actually twice their age, is there a way to multiply the age
column by 2 in one sweep instead of needing to painstakingly go through the whole column and edit each age individually (pretend I have 500 entries so manual work is out of the question).
Is there a SQL solution?
It's really easy:
UPDATE table SET age=age*2