Sql query where is not null

Also there is possibility that there will be multiple errors for a given row, so we need the output to include error1 and error2 etc. We can't use case because then once one error is found the other cases won't be evaluated. So, if a. Error1 is null what kind of output do you want? Error1 is null, simply a white space or empty field. Otherwise the actually value should print for all the errors — Elizabeth. Elizabeth That's exactly what the above code does: If a.

Error1 is null then an empty string '' is used in it's place. You can substitute '' with ' ' to get some white space. Right, the above code is great - but doesn't the case statement work that if case1 is correct case2 isn't evaluated etc? I want all cases evaluated and all errors printed because its possible that there are multiple errors per line.

Show 3 more comments. It's weird how it doesn't exist some kind of! Try this for a cleaner code: select a. IIF a. SpicyTacos23 SpicyTacos23 5 5 silver badges 11 11 bronze badges. Caleth Caleth Matt Matt You can also see the automatically created index that is used to guarantee the column values uniqueness.

Right-click on the needed table and choose Design. Entity integrity ensures that each row in the table is a uniquely identifiable entity. Assume that we have the below simple table with two columns; the ID and Name.

You will see that the first record will be inserted successfully as both the ID and Name values are valid. Checking the inserted values, you will see that only the first record is inserted successfully as below:. Right-click on your table and choose Design. Author Recent Posts. Ahmad Yaseen. Also, he is contributing with his SQL tips in many blogs. If you want to report an error, or if you want to make a suggestion, do not hesitate to send us an e-mail:.

Exercise: Select all records from the Customers where the PostalCode column is empty. Report Error. Your message has been sent to W3Schools. W3Schools is optimized for learning and training.