Sql 如何动态更改视图中列的大小

问题是，我有一个Employee表，其中有一个字段employeeAddress（varchar（200）），我正在SQL Server中创建一个视图EmployeeView，我想将其更改为employeeAddress（varchar（50）），这意味着我只想显示employeeAddress列的50个字符，然后用“…”连接

例如：-新德里（假设它有100个字符） 我想把它改成EmployeeView

NewDel（假设是50个字符），那么它应该是“NewDel…”

您可以试试这个

create view DemoView as select name=SUBSTRING(name,1,50)+'...' from tableName;

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大多数现有答案似乎缺少条件省略的必要性：

CREATE VIEW dbo.EmployeeView
WITH SCHEMABINDING
AS
    SELECT
        /* Other Columns */
        CASE
          WHEN LEN(EmployeeAddress) > 50
            THEN SUBSTRING(EmployeeAddress,1,50) + '...'
          ELSE EmployeeAddress
        END as EmployeeAddress
    FROM
        dbo.Employee

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这是一个奇怪的要求。你为什么要这么做？

CREATE VIEW dbo.EmployeeView
WITH SCHEMABINDING
AS
    SELECT
        /* Other Columns */
        CASE
          WHEN LEN(EmployeeAddress) > 50
            THEN SUBSTRING(EmployeeAddress,1,50) + '...'
          ELSE EmployeeAddress
        END as EmployeeAddress
    FROM
        dbo.Employee