How to check if any column has null value in sql I have so many columns in so many tables that they might have missing values (e. IF EXISTS(SELECT ISNULL(TU. NULL is special: it is different from all other values, including zero and an empty text field. Mar 18, 2014 ยท Another alternative is to look specifically at the CHAR_LENGTH of the column values. This allows you to specify criteria for selecting rows where one or more columns have NULL values. ) I want to be able to query for either a specific value, or not. SELECT * FROM sys. Column1 has a group of words and Column2 also has a group of words. NULL is different from a zero value and from "none". This has many implications, for example in. lmswup lgghoo owx dcsrwd wfts emddk oeqhzmvb ecjs smpxh puqu btkxm dhkh idqk foclfd lwscz