存储过程体就是一条根据name查找部门信息的sql,可以联表查询。 所以此存储过程的创建如下: mysql> DELIMITER &mysql> CREATE PROCEDURE p1(in name VARCHAR(20)) -> BEGIN -> select d.* from emp e,department d -> where e.deptNo = d.id -> and e.ename = name; -> END &Query OK, 0 rows a...
| +---+ 1 row in set (0.05 sec) drop function if exists fun1; delimiter // create function fun1(a double,b double) returns double begin declare c double; set c = a +b; return c; end // delimiter ; select fun1(2.3,5.1); mysql59>select fun1(2.3,5.1); +---+ | fun1(2....
临时表存储在TempDB数据库中,所有的使用此SQL Server 实例的用户都共享这个TempDB,因为我们应该确保用来存储TempDB数据库的硬盘有足够的空间,以使之能够自己的增长.最好能够存储在一个拥有独立硬盘控制器上.因为这样不存在和其它的硬盘I/O进行争用. 我们很多程序员认为临时表非常危险,因为临时表有可能被多个连接所共享...
In all of these statements, SQL Server raises an error if a referenced cursor variable exists but doesn't have a cursor currently allocated to it. If a referenced cursor variable doesn't exist, SQL Server raises the same error raised for an undeclared variable of another type....
===sqlserver:—sql declare –简单赋值 declare @a int set @a=5 select @a –使用select语句赋值 declare @user1 nvarchar(50) select @user1=’张三’ select @user1 declare @user2 nvarchar(50) select @user2 = Name from ST_User where ID=1 ...
In SQL Server 2012, you can set a variable’s initial value at the same time you declare it. For example, the following line of code declares a variable named@ctrof typeintand sets its value to100: DECLARE @ctr int = 100 Previously, this functionality was possible only with stored proce...
1 You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'DECLARE newguid VARCHAR(36)' at line 1 SQL1.sql 4 1 I tried using this syntax also: DECLARE @newguid VARCHAR(36); ...
Definiert die Attribute eines Transact-SQL-Servercursors, wie z. B. dessen Scrollverhalten sowie die Abfrage, die zum Erstellen des Resultsets verwendet wird, in dem der Cursor ausgeführt wird.
(Inherited from TSqlFragment) FragmentLength Defines the number of characters the fragment takes up in the script it was parsed. (Inherited from TSqlFragment) LastTokenIndex Gets or sets the last index of the token. (Inherited from TSqlFragment) ScriptTokenStream Gets or sets the...
SQL Server implicitly converts the cursor to another type if clauses inselect_statementconflict with the functionality of the requested cursor type. FOR UPDATE [ OFcolumn_name[ ,...n] ] Defines updatable columns within the cursor. IfOF <column_name> [, <... n>]is supplied, only the co...