Jun 4, 2009 · NVL is Oracle specific, it was introduced in 80's before there were any standards. In case of two values, they are synonyms. However, they are implemented differently. NVL …

Apr 29, 2016 · Nvl(arg1,arg2) nvl is used for converting null values. In nvl if argument 1 is null then it returns argument 2 but argument 1 is not null it returns itself. In nvl2 (arg1,arg2,arg3) in …

Jul 1, 2014 · COALESCE gives better performance in terms, NVL always first calculate both of the queries used and then compare if the first value is null then return a second value. but in …

Oracle Database currently treats a character value with a length of zero as null. However, this may not continue to be true in future releases, and Oracle recommends that you do not treat …

Sep 8, 2014 · I'm facing a problem in Oracle. I had a SQL where some values were fixed. Now I started replacing them with values from a parameter-table. Some of these fixed values where …

Mar 2, 2020 · select 'ok' from dual where 1 = nvl(1, 'X'); The Oracle documentation for NVL says: If expr1 is numeric, then Oracle determines which argument has the highest numeric …

Jul 5, 2021 · In PL-SQL using nvl will be easier that is true. But when it comes to query (in select statement) will using nvl make it slower? I have a package that have loads of select statement …

Nov 11, 2014 · The SQL statement above would return 'n/a' if the supplier_city field contained a null value. Otherwise, it would return the supplier_city value. Another example using the NVL …

Feb 25, 2015 · select type, craft, sum(NVL(regular, 0) + NVL(overtime, 0) ) as total_hours from hours_t group by type, craft order by type, craft Oracle have 5 NULL-related functions: NVL ; …

Feb 15, 2014 · select a.*, case when (SELECT NVL(b.field2, 0) FROM b where b.field2 = a.tbl_a_PK and rownum = 1) > 0 then 'has data in b' else 'has no data in b' end b_status from …