The SQLCASEstatement evaluates a list of conditions and adds a column with values based on the condition. For example, -- add a new column 'order_volume' in the Orders table-- and flag any order greater than 10000 as 'Large Order'-- and smaller than 10000 as 'Small Order'SELECT*,CASE...
NOTE: SQL commands are not case sensitive. The above SELECT statement can also be written as"select first_name from students_details;" You can also retrieve data from more than one column. For example, to select first name and last name of all the students. ...
我正在尝试做一个SELECT,其中如果CurrencyCode = '',那么我希望结果返回为NULL。例如: SELECT CASE 浏览2提问于2016-04-01得票数 0 回答已采纳 0回答 Sql server select条件case when 、 因此,我想使用CASE WHEN来缩短脚本。如何更改下面的WHEN以使用CASE WHEN而不是IFDECLARE @EDATE1 DATE='2016-01-01' sele...
[ WITH with_query [, ...] ] SELECT [ ALL | DISTINCT ] select_expr [, ...] [ FROM from_item [, ...] ] [ WHERE condition ] [ GROUP BY [ ALL | DISTINCT ] grouping_element [, ...] ] [ HAVING condition] [ WINDOW window_name AS ( window_definition ) [, ...] ] [ { ...
LOCKED]|LOCKINSHARE MODE]]SELECTisusedtoretrieve rows selectedfromoneormore tables,andcan includeUNIONstatementsandsubqueries. See[HELP UNION],andhttp://dev.mysql.com/doc/refman/8.0/en/subqueries.html. ASELECTstatement can startwithaWITHclausetodefine commontableexpressions accessible within theSELECT....
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_1 WHEN selector_value_1 THEN statement_2 ... ELSE else_state...
SELECTau_fname, au_lname, CASEstate WHEN'CA'THEN'California' WHEN'KS'THEN'Kansas' WHEN'TN'THEN'Tennessee' WHEN'OR'THEN'Oregon' WHEN'MI'THEN'Michigan' WHEN'IN'THEN'Indiana' WHEN'MD'THEN'Maryland' WHEN'UT'THEN'Utah' ENDASStateName ...
Hi, I am trying to get data from a table to a datapage calculated field based on conditions that are chosen in the data page.. I get to work without any CASE & WHEN conditions i.e. if I only have to SELECT from one column, but that only takes me halfway.
With a simple case you can check if an input equals any listed key. If it does you can return a corresponding value. This structure of this is: This Evaluates<selector>once Works down the list ofwhenclauses, stopping on the first key that equals the<selector>and returning the correspondi...
by & select子句和CASE运算符中同时使用子查询EN下面来总计下之前的随笔中所说过的所有的SELECT子句的...