Question

I have two columns in my table profile which are id and education. Now I want to randomly allocate education field values which can be in this set('HA','BA,'CA' and 'DA'). How can I do this in one command. id is a primary key for this table.

Answer 1

As documented under ELT(N,str1,str2,str3,…):

Returns str1 if N = 1, str2 if N = 2, and so on.

As documented under RAND():

To obtain a random integer R in the range i <= R < j, use the expression FLOOR(i + RAND() * (j – i)).

Therefore:

UPDATE my_table SET education = ELT(FLOOR(1 + RAND() * 4), 'HA', 'BA', 'CA', 'DA')

See it on sqlfiddle.