SQL SELECT TOP 1是一种用于从数据库中检索数据的SQL查询语句。它用于返回满足特定条件的第一行数据。 概念: - SQL:结构化查询语言(Structured Query Langua...
Can I find out the "Listener" name through a SQL Server Query Can i give a rollup an Alias? Can I have a conditional JOIN? Can I have a primary key as a non-unique column Can I pass parameter to an ALTER DATABASE command Can I prevent deadlock during concurrent delete Can I print...
1. 对select的结果没有任何条件进行select,顺序是怎么样? 对于查询结果集直接进行select查询,特别是已排序的结果集,会改变数据的顺序。 query 1: 代码语言:javascript 复制 id page_id addtime121155840885211115584025901011558399412811558399247931558349702711558349140311558349079541558348372631558348361421558348351211558348337111558342663 qu...
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How do i write a SQL query like this in Linq? x_coloredcode SELECT TOP 1 * FROM table ORDER BY col DESC All replies (12) Thursday, January 10, 2008 8:28 AM ✅Answered x_coloredcode NorthwindDataContext db = new NorthwindDataContext(); var shippers = from shipper in db.Shippers orde...
db.S.Where(q=>q.TypeID==1).OrderByDesending(q=>q.ID).Take(1);
(DictItem::getPriority).last("limit0,1"));} PL/SQL的流程控制语句,包括如下三类:l 控制语句: IF 语句 l 循环语句: LOOP语句, EXIT语句 l 顺序语句: GOTO语句, NULL语句 条件语句：IF <布尔表达式> THEN PL/SQL 和 SQL语句 END IF;IF <布尔表达式> THEN PL/SQL 和 SQL语句 ELSE 其它...
select top1ddiary0_.diary_id as diary_id1_9_, ddiary0_.site_id as site_id26_9_, ddiary0_.catalog_id as catalog27_9_, ddiary0_.user_id as user_id28_9_, ddiary0_.annex_id as annex_id2_9_, ddiary0_.client_agent as client_a3_9_, ddiary0_.client_ip as client_i4_9...
[ ; ]<select_criteria>::=[TOP(top_expression) ] [ALL|DISTINCT] { * |column_name| expression } [ , ...n ] [FROM{table_source} [ , ...n ] ] [WHERE<search_condition>] [GROUPBY<group_by_clause>] [HAVING<search_condition>] [ORDERBY<order_by_expression>] [OPTION(<query_option>...
example, (PRIOR a = level) is not allowed, but (PRIOR a = b) and (level = 1) is allowed. Different conditions refer to the conditions connected by AND at the top of the CONNECT BY clause. For example, (PRIOR a = 1 or level = 1) is considered as a condition and is not ...