Question

There is a table i work in Mysql. There are words and values. Values is Boolean like ‘1’ or ‘0’. Words can repeat more than once. And their values vary. For example one “def” can be ‘0’ while other is ‘1’. What i am trying to find is:

• The values only have zero values. And if there is more than once of this word take only one word.
• But, “def” has ‘0’ value. Also ‘1’ value. It must be only ‘0’ values!

The table is like:

word value
----  -----
abc    1
abc    1
def    0
def    1
def    0
xyz    0
xyz    0
xyz    0
xxx    1
zzz    0

Answer 1

I really don’t understand what you’re trying to obtain.
Anyway I try:

SELECT DISTINCT word FROM your_table
WHERE value = 0

If you want to sort words alphabetically, you can do

SELECT DISTINCT word FROM your_table
WHERE value = 0
ORDER BY word

EDITED in response to user comment:
Try this:

SELECT DISTINCT word,value FROM your_table
WHERE word NOT IN
  (SELECT word FROM your_table WHERE value = 1)

or

SELECT word, SUM(value) as tot FROM your_table
GROUP by word
HAVING SUM(value) = 0