if else in sql function

Case has two formats. Simple case function and case search function.--Simple case function when ' 1 ' then ' Male ' when ' 2 ' then ' women ' else ' other ' end--case search function case when sex = ' 1 ' Then ' man ' when

Case has two formats. Simple case function and case search function.--Simple case function when ' 1 ' then ' Male ' when ' 2 ' then ' women ' else ' other ' end--case search function case when sex = ' 1 ' Then ' man ' when

--Simple case function when ' 1 ' then ' Male ' when ' 2 ' then ' women ' else ' other ' end--case search function case when sex = ' 1 ' Then ' man ' when Sex = ' 2 ' Then ' women ' else ' other ' ENDIn both of these ways,

Back in the evening, the classmate said the interview encountered a SQL interview topic, did a bit of their own, summary summary.The topics are as follows:　　The following is a product data sheet (Product ID, color col, num), each of which is

Reprinted from http://lj.soft.blog.163.com/blog/static/7940248120109215191358/Case has two formats. Simple case function and case search function.--Simple case function when ' 1 ' then ' Male ' when ' 2 ' then ' women ' else ' other '

SQL statement case when then else end returns a qualified value, sqlcase Case has two formats Simple Case functions and Case search functions: -- Simple Case function CASE sex WHEN '1' then' male 'when' 2' then' female 'else' other 'ends -- Case

Header ("Content-type:text/html;charset=utf8");Functions of PHP Operations databasefunction Phpsql ($dbconfig, $type, $field = ", $data =array (), $condition =array (), $join =array ()) {Determine that the database connection host does not existif (!

Use of case, simple case functionA simple case expression that uses an expression to determine the return value. Grammar: Case Search_expression When Expression1 THEN RESULT1 When Expression2 THEN result2 ... When Expressionn THEN Resultn ELSE

CASE has two formats:The simple CASE function compares an expression with a group of simple expressions to determine the result.The CASE search function calculates a group of Boolean expressions to determine the result.Both formats support the

1. Standard SQL specificationOne, single IF1, if A= ... Then.........end if;2, if a= ... then......else....end if; two, more IfIf a=. Then......elsif a=. Then....end if; The middle here is "elsif", not else IF. Special attention is needed