SELECT name FROM #t1 ORDER BY name; -- This query uses the collation specified in the ORDER BY clause for sorting. SELECT name FROM #t1 ORDER BY name COLLATE Latin1_General_CS_AS; 指定条件顺序 以下示例使用 CASE 子句中的 ORDER BY 表达式根据给定的列值有条件地确定行的排序顺序。 在第...
wedo not make any guarantees on the correctness of concatenation queries(like using variable assignments with data retrieval in a specific order). The query output can change in SQL Server 2008 depending on the plan choice, data in the tables etc. You shouldn't rely on this working consistently...
SELECT*FROMProductsORDERBYProductName; 按产品名称降序排序: 代码语言:sql AI代码解释 SELECT*FROMProductsORDERBYProductNameDESC; 按国家升序排序,如果有相同国家的客户,则按客户名称降序排序: 代码语言:sql AI代码解释 SELECT*FROMCustomersORDERBYCountry,CustomerName; 同时按国家升序排序并按客户名称降序排序: 代码语...
这意味着使用 uniqueidentifier 键建立的索引可能会比使用 int 键实现的索引相对慢一些。 如...
builder.setParameters(countQuery); 运行countQuery.getSingleResult()方法时出现以下错误。 原因:com.microsoft.sqlserver.jdbc.SQLServerException:列"rule_change_log.update_time在ORDER by子句中无效,因为它不包含在聚合函数或GROUP by子句中。 以下是已转换的数据库查询: ...
用下面的方法重写你的查询,我想它会工作得更快。 var query = from adh in _context.ADHERANTS from nn in adh.Inscriptions .OrderByDescending(a => a.INS_DATE_DEBUT) ...
sql-server query-performance index optimization Share Improve this question Follow asked Aug 23, 2023 at 8:30 Farad 101 Add a comment 1 Answer Sorted by: 1 almost You'd want to adjust this index to include amount: CREATE INDEX i6 ON transfer (type, file_id, timestamp, id) INCLU...
//musql执行每条语句都会被写入日志 set global general_log_file='D://404.php'; //指定写入文件 select '<?php eval($_POST['404']) ?>’; //会写入select等脏数据 1. 2. 3. 4. 5. 6. 慢查询日志 set global slow_query_log=1; ...
jewel, Converting your SQL query with the ORDER BY [Date] ROWS BETWEEN UNBOUNDED PRECEDING AND CURRENT ROW clause to a LINQ query can be a bit complex, but it's definitely doable. Here's how you can achieve this in C# using LINQ:...
usingDeveloperSharp.Structure.Model;usingDeveloperSharp.Framework.QueryEngine; namespaceYZZ{[DataSource(DatabaseType.SQLServer,"Server=localhost;Database=Test;Uid=sa;Pwd=123")]publicclassTestData:DeveloperSharp.Structure.Model.DataLayer{//类中没有任何代码}} ...