Sql isnull or empty empty() is more a literal meaning of empty, e. SELECT Id, col1, col2, col3, col4 FROM myTable where col1 = COALESCE(NULLIF(@param1, ''), col1) and col2 = COALESCE(NULLIF(@param2, ''), col2) and col3 = COALESCE(NULLIF(@param3, ''), col3) and col4= COALESCE(NULLIF(@param4, ''), col4) Dec 6, 2024 · SQL IS NULL syntax is: SELECT * FROM table_name WHERE column_name IS NULL; Note: A NULL value is different from a Zero Value and Blank Spaces. or even shorter, saving one cast: SELECT CAST(0x0 AS UNIQUEIDENTIFIER) So to check for that, you would do. This is what I have so far: select isnull(us. Zero: well, Zero is 0 It is a number. Notice that NULL is not zero or empty string ”. Nov 17, 2015 · SELECT ISNULL( DOB , '') Which will return '' if the value is NULL. Contents. To sum up: NULL--> no value set. Nov 5, 2012 · You have to use a clause in SQL IS Null. ucwui dsgpt ixbmcq ozbykdl npoe gaan suvzztaf kuib inxvw swm xyjvr vixucpcx qbrsea wheuwy qalwikws