mysql,sql , How to get entries from SQL that only appear in certain value?

How to get entries from SQL that only appear in certain value?


Tag: mysql,sql

I need to find entries in my SQL table that always and only appear in a certain value.

For example:

DeviceID    Transmission
--------    ------------
000329      Inventory
000980      Inventory
004406      Starting
000980      Stopping
000329      Inventory
004406      Inventory

Now I need to find all DeviceIDs that only have Inventory Transmissions and never Starting or Stopping. In this case 000329.


You can select all Transmission = 'Inventory' ids and filter out those exist in Transmission in('Starting', 'Stopping'):

select distinct(DeviceID) from YourTable
WHERE Transmission = 'Inventory'
and DeviceID not in
( select distinct(DeviceID) from YourTable
  WHERE Transmission in('Starting', 'Stopping')

SQL Fiddle:!9/81896/12


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