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 code samples in this article use theAdventureWorks2022orAdventureWorksDW2022sample database, which you can download from theMicrosoft SQL Server Samples and Community Projectshome page. A. Generate list of names separated in new lines The following example produces a list of names in a single ...
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。
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...
Database Research & Development: Example of STRING_AGG() to concatenate Strings per each group in PostgreSQL, It is very similar to STUFF() of SQL Server.
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
sqlSELECTdepartment,GROUP_CONCAT(DISTINCTemployee_nameORDERBYemployee_nameDESCSEPARATOR'; ')ASemployeesFROMemployeesWHEREhire_date>'2020-01-01'GROUPBYdepartment; This example aggregates distinct employee names hired after January 1, 2020, into a semicolon-separated list for each department, ordered in ...
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...