简单Case函数的写法相对比较简洁,但是和Case搜索函数相比,功能方面会有些限制,比如写判断式。 还有一个需要注意的问题,Case函数只返回第一个符合条件的值,剩下的Case部分将会被自动忽略。--比如说,下面这段SQL,你永远无法得到“第二类”这个结果 CASE WHEN col_1 IN ( 'a', 'b') THEN '第一类' WHEN col_...
在Check中使用Case函数在很多情况下都是非常不错的解决方法。可能有很多人根本就不用Check,那么我建议你在看过下面的例子之后也尝试一下在SQL中使用Check。 下面我们来举个例子: 公司A,这个公司有个规定,女职员的工资必须高于1000块。如果用Check和Case来表现的话,如下所示: CONSTRAINT check_salary CHECK ( CASE ...
问在CASE表达式中的MSSQL子选择EN我得到了一个查询，可以根据参数返回一些值。参数按预期工作。它们由提...
mssql: select ,评价=case when name='a' then '优秀' when name='b' then '良好' else '一般' end from xx 1. 2. 3. 4. 5. 6. mysql: select total,case when total>0 then '浪费' else '节约' end as '评价' from month 1. 2. 3. 4....
MS SQL的CASE...WHEN...THEN...END语法,根据多个可能的答案检查一个值或变量。举例说明:SELECT[type],CASE[type]WHEN'TT'THEN'TYPE_TABLE'WHEN'FN'THEN'SQL_SCALAR_FUNCTION'WHEN'C'THEN'CHECK_CONSTRAINT'W
SELECT FirstName, Lastname, TelephoneNumber, IIf(IsNull(TelephoneInstructions),"Any time", TelephoneInstructions) AS [When to Contact]FROM db1.ContactInfo 以下示例使用 CASE 为 AdventureWorks 视图中的 TelephoneSpecialInstructions 列提供输出值，该视图名称为 Person.vAdditionalContactInfo。USE ...
Connect to Microsoft SQL Server, Azure SQL Database and SQL Data Warehouses. Create and manage connection profiles and most recently used connections. Write T-SQL script with IntelliSense, Go to Definition, T-SQL snippets, syntax colorizations, T-SQL error validations andGObatch separator. ...
To use this driver, use this require syntax: const sql = require('mssql/msnodesqlv8'). Note: If you use import into your lib to prepare your request (const { VarChar } = require('mssql')) you also need to upgrade all your types import into your code (const { VarChar } = require...
At a command prompt, use the following syntax to run instjdbc.sql: ISQL -Usa -Psa_password -Sserver_name -ilocation\instjdbc.sql where: sa_password is the password of the system administrator. server_name is the name of the server on which SQL Server resides. location is the full...
External Configuration Syntax Troubleshooting Querying Property Data Breaking Changes Deprecated Features Quick Start The most basic minimalistic sink initialization is done like this. Log.Logger=newLoggerConfiguration().WriteTo.MSSqlServer(connectionString:"Server=localhost;Database=LogDb;Integrated Security=SS...