The key to using simple CASE statements effectively is understanding how to compare an expression to fixed values.The expression in a simple CASE statement can be a column name, a function, or any valid SQL expression. The values in the WHEN clauses are the fixed values against which we wan...
SELECTcolumn1, column2, ...CASEWHENcondition1THENresult1WHENcondition2THENresult2-- Add more WHEN conditions and results as neededENDASalias_nameFROMtable_name; We can add as manyWHEN ... THENconditions as required in theCASEstatement. For example, -- multiple CASE conditions in SQLSELECTcusto...
Both types of CASE statements support an optional ELSE clause. Simple PL/SQL CASE statement A simple CASE statement evaluates a single expression and compares the result with some values. The simple CASE statement has the following structure: CASE selector WHEN selector_value_1 THEN statements_...
SELECT first_name, last_name FROM student_details; You can also use clauses like WHERE, GROUP BY, HAVING, ORDER BY with SELECT statement. We will discuss these commands in coming chapters. NOTE: In a SQL SELECT statement only SELECT and FROM statements are mandatory. Other clauses like ...
To group the data, we just put the case statement in the GROUP BY clause. To have additional insights, we ordered the rows on decreasing order based on the average gross. In this way, we are able to catch the highest average gross is assigned to the high ROI and vice versa for the ...
clause:子句,一条SQL里的部分,比如上面的SELECT xxx,JOIN xxx,HAVING xxx等都是。一条statement由若干条clause按一定顺序组成(语法规则)。 experession:表达式,clause中的一部分,比如 WHERE id>1 里的 id>1 是个expression 一些不常见的SQL语句: 不常见的一些SQL:SELECTCOALESCE(age,'42')FROMusers;SELECT*FROM...
clauses must be placed together Answer: C.SQL statements are not case sensitive. Column Heading Defaults: 默认的列标题(表的第一行): Arithmetic expressionsandNULLvalues in theSELECTstatement SELECT语句中的算术表达式和空值 首先介绍显示表结构的命令 ...
Hi I am trying to check the usage of case statement in SELECT. Example: The partner fucntion table -> VBPA we have data as below for sales order '12345' VBPA-VBELN = '12345' VBPA-POSNR = '000000' VBPA-PARVW = 'NA' VBPA-KUNNR = ' ' ...
The CASE statement goes through conditions and returns a value when the first condition is met (like an IF-THEN-ELSE statement). So, once a condition is true, it will stop reading and return the result. If no conditions are true, it returns the value in the ELSE clause.If there is no...
CASE statement in SQL returns Null CASE statement in WHERE clause for IS NULL: I want to say IS or IS NOT Null for a column using CASE Case Statement in Where clause with parameters SQL Server CASE statement inclusion and exclusions case statement inside a where clause with 'IN' operator ...