他给的示例SQL如下： select HName,case when IsEnable=1 then '启用' else '停用' from tb_User OQL是SOD框架的ORM查询语言，它类似Linq，但是它诞生的历史比Linq早，并且更加接近SQL语法。所以，对SOD框架而言，对应ORM如何支持CASE WHEN，就等于是问OQL如何支持CASE WHEN了。 这个问题已经不止这一个朋友来问我了，我想了下
使用变量将SQL更新为NULL 在select语句中将SQL CASE设置为多个变量 如果SQL Server CASE值为NULL,则不返回任何内容 在SQL LIKE语句中使用变量 在case语句中将列设置为null PL/SQL ORA-01400:使用CASE时无法插入NULL 在赋值为null之前检查变量是否为null? 在python中使用变量的SQL Like语句 使用PHPUnit时,全...
3、根据业务需求画Use Case视图 Note:从左侧的ToolBox工具栏中 选择一些Use Case的元素,直接拖曳左边的Element,到右边的工作区,就可以把Element放到咱们的Use Case试图中。 A、拖曳两个Actor 元素到工作区,分别命名为“供应商”“商品开发人员” B、拖曳三个Use Case元素到工作区,分别命名为“商品提报”“CSV档导...
Use CASE WHEN statement in SELECT /* mysql> SELECT Name, RatingID AS Rating, -> CASE RatingID -> WHEN 'R' THEN 'Under 17 requires an adult.' -> WHEN 'X' THEN 'No one 17 and under.' -> WHEN 'NR' THEN 'Use discretion when renting.' -> ELSE 'OK to rent to minors.' -> ...
In this case: the client can generate the SQL statement in chunks of 16Mbyte and write them to the network *(memory usage)* the server waits until the full 1GByte is received *(execution delay)* before it can start parsing and executing it ...
SQL SUM– If you want to get the sum of all values of a specified column or expression then you can use SQL function SUM(). Let me show you a use case in which I will use all the above aggregate functions to return their respective values as shown below. ...
However, in this case you need to have small and self-contained application where there are minimal interaction between products and other entities such as orders, customers, suppliers, etc. If these related entities are stored in the relational database, NoSQL is not an option because you ...
The complete guide to SQL IF. Learn the syntax, parameters, use cases and find practical examples in the Hightouch SQL Dictionary.
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[NINUSIKIJI] = CASE WHEN( P.[NINUSIKIJI] IS NULL OR P.[NINUSIKIJI] = '' ) THEN @NINUSIKIJI ELSE P.[NINUSIKIJI] END, [NINUSISECCD] = (CASE WHEN( P.[NINUSISECCD] IS NULL OR P.[NINUSISECCD] = '' ) THEN @NINUSISECCD ...