因为这样应用程序首先将二进制 值转换成字符串(尺寸是它的两倍),服务器受到字符后又将他转换成二进制值.存储过程就没有这些动作: 方法:Create procedure p_insert as insert into table(Fimage) values (@image), 在前台调用这个存储过程传入二进制参数,这样处理速度明显改善。 29、B
A table variable, within its scope, can be used as a table source in an INSERT statement.The view referenced by table_or_view_name must be updatable and reference exactly one base table in the FROM clause of the view. For example, an INSERT into a multi-table view must use a column_...
有关详细信息,请参阅 WITH common_table_expression (Transact-SQL)。 TOP (expression) [ PERCENT ] 指定将插入的随机行的数目或百分比。 expression 可以是行数或行的百分比。 有关详细信息,请参阅 TOP (Transact-SQL)。 INTO 一个可选的关键字,可以将它用在 INSERT 和目标表之间。 server_name 适用于:SQL...
-- Syntax for SQL Server and Azure SQL Database and Fabric SQL database [ WITH <common_table_expression> [ ,...n ] ] INSERT { [ TOP ( expression ) [ PERCENT ] ] [ INTO ] { <object> | rowset_function_limited [ WITH ( <Table_Hint_Limited> [ ...n ] ) ] } { [ ( column...
将一行或多行添加到 SQL Server 的表或视图中。 有关示例,请参阅示例。Transact-SQL 语法约定语法syntaxsql 复制 -- Syntax for SQL Server and Azure SQL Database [ WITH <common_table_expression> [ ,...n ] ] INSERT { [ TOP ( expression ) [ PERCENT ] ] [ INTO ] { <object> | rowset...
First, a document is assigned to an xml type variable. Then, a series of insert XML DML statements is used to insert attributes into the document. After each attribute insertion, the SELECT statement displays the result. SQL Copy USE AdventureWorks; GO DECLARE @myDoc XML; SET @myDoc = ...
Examples in this section demonstrate how to insert rows by specifying a view or table variable. A. Inserting data by specifying a view The following example specifies a view name as the target object; however, the new row is inserted in the underlying base table. The order of the values in...
A table variable, within its scope, can be used as a table source in an INSERT statement. The view referenced by table_or_view_name must be updatable and reference exactly one base table in the FROM clause of the view. For example, an INSERT into a multi-table view must use a column...
INSERT INTO table (`a`, `b`, `c`, ……) VALUES ('a', 'b', 'c', ……); 这里不再赘述,注意顺序即可,不建议小伙伴们去掉前面括号的内容,别问为什么,容易被同事骂。 1-2.插入或更新 如果我们希望插入一条新记录(INSERT),但如果记录已经存在,就更新该记录,此时,可以使用"INSERT INTO …ON DUPLI...
A. Inserting element nodes into the document The following example illustrates how to insert elements into a document. First, an XML document is assigned to a variable of xml type. Then, through several insert XML DML statements, the example illustrates how element nodes are inserted in the doc...