> With Multiple Columns: SELECT name, dept, commission FROM employees ORDER BY dept ASC, commission DESC NULLS LAST; • Within each department → commission highest first → NULLs at the very end! > Quick Summary: • ORDER BY = sorts results - always the last clause in the query • Can sort by column name, alias, or position number • Column alias CAN be used in ORDER BY - it runs after SELECT • ASC = low to high (default - no need to write it) • DESC = high to low - must write explicitly • Each column in multi-sort can have its own ASC or DESC direction • Dates sorted chronologically - DESC gives most recent first • ASC → NULLs at bottom by default • DESC → NULLs at top by default • NULLS FIRST → forces NULLs to top regardless of sort direction • NULLS LAST → forces NULLs to bottom regardless of sort direction #OracleSQL #ORDERBY #ASC #DESC #NullsFirst #NullsLast #LearnSQL #SQLBeginners #Day15 #100DaysOfCode #TechTwitter

Sorting a List having null values with Comparator's nullsFirst - #Java Code Geeks - 2023 buff.ly/32pXKbl

Sorting a List having null values with Comparator's nullsFirst - #Java Code Geeks - 2023 buff.ly/32pXKbl

Sorting a List having null values with Comparator's nullsFirst - #Java Code Geeks - 2023 buff.ly/32pXKbl

Sorting a List having null values with Comparator's nullsFirst - #Java Code Geeks - 2023 buff.ly/32pXKbl

Sorting a List having null values with Comparator's nullsFirst - #Java Code Geeks - 2023 buff.ly/32pXKbl

Same for #Comparator: * to compare objects by an attribute, use `Comparator.comparing` * to sort by several attributes, chain comparators with `thenComparing` * reverse with `reversed` * use `nullsFirst` or `nullsLast` to handle `null` More: dev.java/learn/writing-and-c…

. @rails 7 supports NullsFirst for all databases #rails #rubyonrails blog.saeloun.com/2021/10/12/…

Sorting a List having null values with Comparator's nullsFirst | #Java Code Geeks - 2021 buff.ly/32pXKbl

Sorting a List having null values with Comparator's nullsFirst | #Java Code Geeks - 2021 buff.ly/32pXKbl

Sorting a List having null values with Comparator's nullsFirst | #Java Code Geeks - 2020 buff.ly/32pXKbl

Sorting a List having null values with Comparator's nullsFirst | #Java Code Geeks - 2020 buff.ly/32pXKbl

Sorting a List having null values with Comparator's nullsFirst | #Java Code Geeks - 2020 buff.ly/32pXKbl

Sorting a List having null values with Comparator's nullsFirst | #Java Code Geeks - 2020 buff.ly/32pXKbl

Methods added to Comparator Interface in #Java8 comparing thenComparing reversed naturalOrde reverseOrder nullsFirst nullsLast #Java

「Order byでnullを先頭に持ってくる」っていう１年に１回位見かける要件が出てきて、どうやるか調べようと思った時に前職で使ってたORMにはそれをやってくれるNullsFirstっていう専用メソッドがあったようなぁと思い出してググってSQL参考にしてscope書いた。