SELECTID,STRING_AGG(Value,', ')WITHINGROUP(ORDERBYValue)ASAggregatedValuesFROMExampleTableGROUPBYID; 1. 2. 3. 4. 5. 6. 7. 代码解释:使用WITHIN GROUP (ORDER BY Value)可以将拼接的字符串根据Value排序后再进行拼接。 总结 在SQL Server 中使用STRING_AGG实现字符串的动态拼接是一个非常实用的功能。...
The following example replaces null values with 'N/A' and returns the names separated by commas in a single result cell.SQL העתק USE AdventureWorks2022; GO SELECT STRING_AGG(CONVERT(NVARCHAR(max), ISNULL(FirstName,'N/A')), ',') AS csv FROM Person.Person; GO ...
Similar to the previous example, the following query finds the email addresses of employees, groups them by city, and sorts the emails alphabetically: SQL USEAdventureWorks2022; GOSELECTTOP10City, STRING_AGG(CONVERT(NVARCHAR(max), EmailAddress),';')WITHINGROUP(ORDERBYEmailAddressASC)ASEmailsFROMPer...
Similar to the previous example, the following query finds the email addresses of employees, groups them by city, and sorts the emails alphabetically: SQL USEAdventureWorks2022; GOSELECTTOP10City, STRING_AGG(CONVERT(NVARCHAR(max), EmailAddress),';')WITHINGROUP(ORDERBYEmailAddressASC)ASEmailsFROMPer...
你可以通过运行上述代码来验证其正确性。执行后,AggregatedValue 列将包含 'A,B,C',这是将 ExampleTable 表中的 Value 列值合并为一个由逗号分隔的字符串的结果。 这个替代方案虽然不如直接使用 string_agg 函数那么简洁,但在 SQL Server 2014 中是可行的,并且能够满足将多行数据合并为一个字符串的需求。
Database Research & Development: Example of STRING_AGG() to concatenate Strings per each group in PostgreSQL, It is very similar to STUFF() of SQL Server.
我在SQL Server 2017 中使用 STRING_AGG 函数。我想创建与 COUNT(DISTINCT <column>) 相同的效果。我试过 STRING_AGG(DISTINCT <column>,',') 但这不是合法的语法。 我想知道是否有 T-SQL 解决方法。这是我的示例: WITH Sitings AS ( SELECT * FROM (VALUES (1, 'Florida', 'Orlando', 'bird'), (...
SQL ServerSTRING_AGG 参考: How To UseSTRING_AGG– Concat Multiple Row Values In SQL Server 如果你想做string.join(',', collection) 的话, 那么就可以使用STRING_AGG了 1. 简单用 SELECTSTRING_ ... sql 数据 转载 mob604756e9d3bc 2021-09-15 12:02:00 ...
Transact-SQL 1 2 3 --example of what happens if you don't initialize @sql and leave it null declare@myVarnvarchar(max); select@myVar;-- see the default is null Now let’s add some commas to separate each value: Transact-SQL
The following example replaces null values with 'N/A' and returns the names separated by commas in a single result cell. SQL Cóipeáil USE AdventureWorks2022; GO SELECT STRING_AGG(CONVERT(NVARCHAR(max), ISNULL(FirstName,'N/A')), ',') AS csv FROM Person.Person; GO Here's the re...