Search all columns of a table for a value?

Question

I\'ve looked for an answer to this, but all I can find is people asking how to search all columns of ALL tables in a database for a value. I just want to search all columns

Answer 1

Cutesie little work-around that involves a bit less copy-paste, since the command can be produced easily using queries.

Invert the IN operator in a WHERE clause as VALUE IN (as opposed to the more common use case of FIELD IN ).

SELECT col_1, col_2, ... , col_n 
FROM 
WHERE CAST( AS varchar(max)) IN 
   (
   CAST(col_1 AS varchar(max)),
   CAST(col_2 AS varchar(max)),
   ...,
   CAST(col_n AS varchar(max))
   )


Since varchar is a pretty malleable data type, this becomes pretty foolproof (you can throw ISNULL/NULLIF to modify as needed), and depending on the use case can probably be used across more than one search value.

A more robust solution, using dynamic execution and PL/SQL would be to write a procedure to dynamically build a view of the target table (via reading  e.g. MySQL's information_schema schema, Oracle's SYS schema, etc.), constrained to a where clause containing the input string hard-coded into a series of 'OR'-concatenated/IN clauses for filter conditions.
    

             

                                                        
            
            

              
                
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