Article: sql order by case
December 22, 2020 | Uncategorized
SELECT fieldlist FROM table WHERE selectcriteria [ORDER BY field1 [ASC | DESC ][, field2[ASC | DESC ]][, …]]] A SELECT statement containing an ORDER BY clause has these parts: I tried an experiment where a user-preferred sort order gave them the option of sorting a list alphabetically or by due date, and T-SQL kept trying to convert the string field to an integer. In above case, all records having Active = 1 is sorted on “Active ASC” order. CentOS 6.x の PostgreSQL 8.4 と SQLite3 で動作確認。何らかのデータをソートして表示する際、特定の行だけは上位に表示したい事がある。例えば、国マスタをコード順でソートした時に、日本を一番上に表示し、他はコードでソートして表示したい、等々。 単純にコードでソートした場合の例 db=> S… Effect of ORDER BY on OFFSET and FETCH. In most cases, the SQL server returns records in the same order they are added to the database. The following statement sorts the customer … More than one columns can be ordered one within another. Like we did in the CASE operator, we can specify a custom order rank for each item of concern like so: ORDER BY FIELD (currency_code, 'USD', 'EUR', 'JPY', 'GBP', 'CAD', 'AUD') ASC It makes your SQL less portable, as other Databases might not have such a function. In effect, SQL first retrieves the data you specified, such as columns, then order the data in ascending or descending order. In some cases, the rows that appear in the result set are in the order that they are stored in the table physically. 1. When used with character data type columns it sorts data in dictionary-order. This article is as per request from Application Development Team Leader of my company. The ORDER BY clause is used in a SELECT statement to sort results either in ascending or descending order. Ex: select * from tbl order by case @ord when 1 then col1 end, case @ord when 2 then col2 end, case @ord when 3 then col3 end 2. To sort the records in descending order, use the DESC keyword. The CASE statement uses the DATEPART function to determine the hour and then returns the appropriate greeting. ORDER BY clause can be used to sort the results returned by SELECT statement in SQL Server. July 17, 2007. The query on table tab_case includes both column a_col and the aggregate expression SUM(a_col) in the Projection list, … The ORDER BY command sorts the result set in ascending order by default. … The CASE statement is used to add conditional logic to Transact-SQL statements. How to apply CASE in ORDER BY for complex sorting? CASE with Order by. Of course, the number of rows you fetch in this case may be much larger. Expression A sort key expression, such as numeric, string, and datetime expressions. ORDER BY (CASE WHEN cli.clientname <> 'Client A' THEN ColumnC END) Is the scenario presented here suggesting that different blocks of rows would have different sort orders, or is there a WHERE filter also involved here such that the query would be returning either 'Client A' or NOT 'Client A'? In this case, SQL Server uses BusinessEntityID and returns all of the records and it will order the result set based on that specific field. The SQL ORDER BY clause allows you to order your results. When only the time portion is provided, the date is set to 01/01/1900. T-SQL: ORDER BY(CASE WHEN?) Execute the following Microsoft SQL Server T-SQL example scripts in Query Editor to sort the results using the CASE function in the ORDER BY clause. In the following example, column a_col of table tab_case is of type INT. By default, the SQL results are not ordered in any specific order. -- CASE will pick MiddleName or FirstName for the 2nd sorting term -- If MiddleName is picked, the final FirstName sort will do an order by -- within the same LastName & MiddleName entries - SQL Server Case in Order … Without the ORDER BY clause in your SQL query, the results may look like they are in a certain order. You can specify what you want to order by, and can even order by multiple columns. The statements listed below show to use CASE to SELECT a message that is reflective of the time of day.--Results--Notice that I did not include the date portion when setting the value for the @DateTime variable. The following SQL statement selects all the columns from the "Customers" table, sorted by the "CustomerName" column: The ORDER BY keyword sorts the records in ascending order by default. You can use a variation of the CASE expression above if the various columns on which you want to sort are of the same type (this is the simple scenario). FROM dbo.PRIORITY_COMP_SETTING pcs WITH(NOLOCK) ORDER BY pcs.PRIORITY_IND FOR XML PATH (”) ),2,20000) –PRINT @LIST SELECT * FROM dbo.players ORDER BY ( SELECT @LIST) The only thing to keep in mind is to specify column names in single quotes in case you are directly writing the logic in order by clause instead of using a varchar type variable. It depends on the user that, whether to order them in ascending or descending order. Pinal Dave. The ORDER BY clause orders or sorts the result of a query according to the values in one or more specific columns. RHADMIN asked on 2009-04-06. 126 Comments. SELECT * FROM PersonalDetails ORDER BY CASE Active WHEN 1 THEN Active END ASC, CASE WHEN Active = 0 THEN LastName ELSE FirstName END DESC. SQL ORDER BY. ORDER BY CASE WHEN sortorder = 1 THEN x WHEN sortorder = 2 THEN x,y END; "sortorder" is a variable I pass in, by the way. SQL, SQL Performance, SQL Server, SQL Tips and Tricks. Introduction to SQL ORDER BY clause When you use the SELECT statement to query data from a table, the order which rows appear in the result set may not be what you expected. SQL Server is a very interesting subject. In other words, if you want to order by a column, that column must be specified in the SELECT list. SQL SERVER – CASE Statement in ORDER BY Clause – ORDER BY using Variable If you have any such example, please post it here and I will be happy to post it with due credit to you. Syntax for using SQL ORDER BY clause to sort data is: SELECT column-list FROM table_name [WHERE condition] [ORDER BY column1 [, column2, .. columnN] [DESC]]; One of the Largest Selections of Commercial & Residential Lawn Care Equipment in the Mountain Home Arkansas area. The output of the CASE function is a dynamic column name. SQL Order By clause is used with SQL Select queries. Expression can also be a row value expression such as a scalar subquery or case expression. Dynamic sort order Hi,Query 1:SELECT * FROM(SELECT 10 a,20 b FROM dualUNIONSELECT 50,30 FROM dual)ORDER BY CASE 1 WHEN 1 THEN a ELSE b END DESC;output:A B-----50 3010 20Query 2:SELECT * FROM(SELECT 10 a,20 b FROM dualUNIONSELECT 50,30 FROM du There is no guarantee that records are returned in a specific order when you don't use sorting options in SQL. Note: The default ORDER is ascending order and result-set is sorted in ascending order based on the field that is specified in the SQL query. Last Modified: 2012-05-06. You can connect with on LinkedIn here. order by (case @index when 4 then TABLE_SCHEMA else COLUMN_NAME end) If the answer to your question can be found with a brief Google … To do this, we use the CASE after ORDER BY and then checks for column value. The ORDER BY command is used to sort the result set in ascending or descending order. Query Syntax; Microsoft SQL Server 2005; Microsoft SQL Server 2008; 13 Comments. It orders the result set by specified column list. So, if you need results to be … The SQL ORDER BY clause is used to sort the records in the result set for a SELECT statement. Generate a query with CASE expressions in ORDER BY clause. Serving the local area, and shipping Mowers and lawn equipment across the US outside of Arkansas, TAX FREE. 2 Solutions. However, the Oracle database cannot guarantee that the results will always be in the same order. We can use CASE with Order By. So we can simplify the ORDER BY clause like this: Oracle sorts query results in ascending order by default. Sorting is done after the result set is obtained; We can use multiple columns with order by clause, sorting will happen from left side columns first and then towards the left side columns. The first thing to notice is that in both cases, for sortorder 1 and also for sortorder 2, the rows must be sorted into major sequence on the "x" column. The SQL ORDER BY clause is used to sort the data in ascending or descending order, based on one or more columns. 1,706 Views. The SQL ORDER BY Keyword The ORDER BY keyword is used to sort the result-set in ascending or descending order. We will look at sql order by example with multiple columns to understand this scenario. OFFSET and FETCH only work in conjunction with an ORDER BY clause. Using a Sort Order Column I noticed one caveat to using the CASE statement for conditional sorting in T-SQL: Both fields being sorted must be the same data type. When you run a SELECT query without any sorting options, the SQL server returns the records in an indiscriminate order. The default order is ascending. SQL SERVER – CASE Statement in ORDER BY Clause – ORDER BY using Variable. Below is the example MS-SQL code: Declare @Order Int; Set @Order = 1 Select * from Guru99 order by CASE WHEN @Order = 1 THEN Tutorial_ID WHEN @Order = 2 THEN Tutorial_Name END DESC Here CASE is used with Order By. To sort the records in descending order, use the DESC keyword. B) Sort a result set by one column in descending order. Some databases sort the query results in an ascending order by default. How to use Numbers and specify descending order The ORDER BY clause can include CASE expressions to specify a sorting key. SQL Order By Syntax ASC Specifies that the results should be returned in ascending order. Ordered in any specific order when you run a SELECT statement to sort the records in descending the... Arkansas area SELECT queries records are returned in a specific order conjunction with order. 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