MS SQL SERVER 支持三种类型的游标:Transact_SQL 游标,API服务器游标和客户游标。 (1)Transact_SQL 游标 Transact_SQL 游标是由DECLARE CURSOR 语法定义、主要用在Transact_SQL脚本、存储过程和触发器中。Transact_SQL 游标主要用在服务器上,由从客户端发送给服务器的Transact_SQL 语句或是批处理、存储过程、触发器...
1 row in set 三、再来看下inout模式: DELIMITER $$ CREATE PROCEDURE set_counter(INOUT count INT(4),IN inc INT(4)) BEGIN SET count = count + inc; END$$ DELIMITER ; 上面的sql运行原理如下: set_counter存储过程接受一个INOUT参数(count)和一个IN参数(inc)。 在存储过程中,通过inc参数的值增加...
下面先给出一个客户端 USE语句的跟踪堆栈。 mysql> use mysql (gdb) bt #0 com_use (buffer=0x93c0c0 <glob_buffer>, line=0x9f5570 "use mysql") at /home/loushuai/src/mysql/hust-mysql/client/mysql.cc:4118 #1 0x000000000040c619 in read_and_execute (interactive=true) at /home/loushuai/s...
I'm wondering if certain SQL statements cannot be used in combination with cursor fetch? The reason for asking is that running the SQL "show engines" results in "java.sql.SQLException: The statement (1) has no open cursor". The following simple Java program exemplifies this. See the main....
You can use a query hint within a cursor declaration. However, if you also use theFOR UPDATE OFclause, specifyOPTION (<query_hint>)afterFOR UPDATE OF. SQL Server implicitly converts the cursor to another type if clauses inselect_statementconflict with the functionality of the requested cursor...
You can use a query hint within a cursor declaration. However, if you also use theFOR UPDATE OFclause, specifyOPTION (<query_hint>)afterFOR UPDATE OF. SQL Server implicitly converts the cursor to another type if clauses inselect_statementconflict with the functionality of the requested cursor...
bufferedis the abbreviated form of SQLSRV_CURSOR_CLIENT_BUFFERED. If a query generates multiple result sets, theScrollableoption applies to all result sets. Selecting Rows in a Result Set After you create a result set, you can usesqlsrv_fetch,sqlsrv_fetch_array, orsqlsrv_fetch_objectto speci...
A USE database statement is not allowed in a procedure, function or trigger. A week this year Against a week this time last year in SQL (NOT MDX) A WITH keyword and parenthesis are now required Accent Sensitivity Access Code - DELETE Statement with DISTINCTROW and T-SQL Access Now() vs...
For your question:- cursor in trigger As already suggest, Cursor slow down the process, trigger also slow down the process, so it is advisable that not use that thing. also if you use transaction, then never get the updated result in cursor, still the commit done. ...
Query references remote tables in linked servers. Becomes keyset. Becomes keyset. 5 5 Query references at least one table without a unique index. Transact-SQL cursors only. Becomes static. Done Note Fast forward cursors are never converted. ...