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        将字段值连接到 SQL Server 中的字符串

        Concat field value to string in SQL Server(将字段值连接到 SQL Server 中的字符串)
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                  本文介绍了将字段值连接到 SQL Server 中的字符串的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着跟版网的小编来一起学习吧!

                  问题描述

                  我需要一个与 SQL Server 中的 Oracle WM_CONCAT 类似的函数,它返回一个逗号分隔的列表,其中包含您将其作为参数传递的任何字段.例如,在 Oracle 中,

                  I need a similar function to Oracle WM_CONCAT in SQL Server, which returns a comma separated list of whatever field you pass it as argument. For example, in Oracle,

                  select WM_CONCAT(first_name) from employee where state='CA' 
                  

                  返回约翰、吉姆、鲍勃".

                  returns "John, Jim, Bob".

                  如何在 SQL Server 中执行此操作?

                  How can I do this in SQL Server?

                  谢谢

                  推荐答案

                  在SQL Server 2017中增加了STRING_AGG函数

                  In SQL Server 2017 STRING_AGG function has been added

                  SELECT t.name as TableName
                        ,STRING_AGG(c.name, ';') AS FieldList
                    FROM sys.tables t
                    JOIN sys.columns c 
                      ON t.object_id = c.object_id
                    GROUP BY t.name;
                  

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