How to request a random value from a column in sqlite?

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i am having 10 columns or fields
s.no ans1 ans2 ans3 ... ans10
1 a b c x

i want a sqlite code to select a random column

What I have tried:

SELECT column FROM table
ORDER BY RAND()
LIMIT 1

Posted 11-Oct-18 0:25am

Ruban Bharath

Updated 11-Oct-18 3:24am

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Mohibur Rashid 11-Oct-18 6:31am

Why?

Ruban Bharath 11-Oct-18 6:33am

why means i cannot get you?

2 solutions

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CPallini · Answer 1 · 2018-10-11T03:24:00

Solution 2

It is

SQL

SELECT column FROM table
ORDER BY RANDOM()
LIMIT 1

See SQLite Random[^].

Posted 11-Oct-18 3:24am

CPallini

Comments

Richard Deeming 11-Oct-18 9:38am

Surely that would return a random row, when the OP said they wanted to return a random column?

Although confusingly, the "What I have tried" code seems to contradict the question. :)

CPallini 11-Oct-18 9:45am

Look at the question title: "[...] random value from a column". Such a sentence agrees with the OP attempt. You know, we must go on with guesswork :-)

Richard MacCutchan · Answer 2 · 2018-10-11T01:13:00

Use the rand()* method to get a random value between 1 and 10 inclusive. Create a SELECT clause by concatenating the number to the base column id, and pass that to the database. Something like:

column = rand(1..10)
string select = "SELECT ans" + column + "remainder of select clause"

* you have not mentioned what language you are using so the above is only pseudocode.