-
您的位置:首页 → 技术开发 → 数据库教程 → 动态SQL四种类型的语句格式
动态SQL四种类型的语句格式
时间:2004/11/7 4:14:00来源:本站整理作者:蓝点我要评论(0)
-
1.Dynamic SQL Format 1
EXECUTE IMMEDIATE SQLStatement {USING TransactionObject} ;
eg:
string Mysql
Mysql = "CREATE TABLE Employee "&
+"(emp_id integer not null,"&
+"dept_id integer not null, "&
+"emp_fname char(10) not null, "&
+"emp_lname char(20) not null)"
EXECUTE IMMEDIATE :Mysql ;
2.Dynamic SQL Format 2
PREPARE DynamicStagingArea FROM SQLStatement {USING TransactionObject} ;
EXECUTE DynamicStagingArea USING {ParameterList} ;
eg:
INT Emp_id_var = 56
PREPARE SQLSA
FROM "DELETE FROM employee WHERE emp_id=?" ;
EXECUTE SQLSA USING :Emp_id_var ;
3.Dynamic SQL Format 3
DECLARE Cursor | Procedure DYNAMIC CURSOR | PROCEDURE FOR DynamicStagingArea ;
PREPARE DynamicStagingArea FROM SQLStatement {USING TransactionObject} ;
OPEN DYNAMIC Cursor {USING ParameterList} ;
EXECUTE DYNAMIC Procedure {USING ParameterList} ;
FETCH Cursor | Procedure INTO HostVariableList ;
CLOSE Cursor | Procedure ;
eg:
integer Emp_id_var
DECLARE my_cursor DYNAMIC CURSOR FOR SQLSA ;
PREPARE SQLSA FROM "SELECT emp_id FROM employee" ;
OPEN DYNAMIC my_cursor ;
FETCH my_cursor INTO :Emp_id_var ;
CLOSE my_cursor ;
4.Dynamic SQL Format 4
DECLARE Cursor | Procedure DYNAMIC CURSOR | PROCEDURE FOR DynamicStagingArea ;
PREPARE DynamicStagingArea FROM SQLStatement {USING TransactionObject} ;
DESCRIBE DynamicStagingArea INTO DynamicDescriptionArea ;
OPEN DYNAMIC Cursor | Procedure USING DESCRIPTOR DynamicDescriptionArea ;
EXECUTE DYNAMIC Cursor | Procedure USING DESCRIPTOR DynamicDescriptionArea ;
FETCH Cursor | Procedure USING DESCRIPTOR DynamicDescriptionArea ;
CLOSE Cursor | Procedure ;
eg:
string Stringvar, Sqlstatement
integer Intvar
Sqlstatement = "SELECT emp_id FROM employee"
PREPARE SQLSA FROM :Sqlstatement ;
DESCRIBE SQLSA INTO SQLDA ;
DECLARE my_cursor DYNAMIC CURSOR FOR SQLSA ;
OPEN DYNAMIC my_cursor USING DESCRIPTOR SQLDA ;
FETCH my_cursor USING DESCRIPTOR SQLDA ;
// If the FETCH is successful, the output
// descriptor array will contain returned
// values from the first row of the result set.
// SQLDA.NumOutputs contains the number of
// output descriptors.
// The SQLDA.OutParmType array will contain
// NumOutput entries and each entry will contain
// an value of the enumerated data type ParmType
// (such as TypeInteger!, or TypeString!).
CHOOSE CASE SQLDA.OutParmType[1]
CASE TypeString!
Stringvar = GetDynamicString(SQLDA, 1)
CASE TypeInteger!
Intvar = GetDynamicNumber(SQLDA, 1)
END CHOOSE
CLOSE my_cursor ;
相关阅读
Mac访问Windows共享文件夹Windows 7正版系统验证方法windows 8.1系统版本号查看方法Windows 8.1系统电话激活时无法输入微软返回代码解决方法Windows 8如何调整屏幕分辨率windows8.1磁盘占用100%解决方法Mac双系统如何删除Boot Camp安装的Windows分区Apple教你如何在Mac 上运行 Windows
-
热门文章
oracle10g安装图解(wi
最新文章
数据库流行度排行2019oracle10g安装图解(wi
SQL2008全部数据导出导入两种方法SQL2005新建复制“找不到存储过程 错误:28Dos远程登录mysql数据库详细图文教程mysql怎么开启远程登录功能
人气排行
mysql自动定时备份数据库的最佳方法-支持wiVisual Foxpro 6.0安装向导图文教程SQL Server 2008 安装图文教程SQL2008全部数据导出导入两种方法SQL 2000/2005/2008 的收缩日志方法,和清理mysql出 Can't connect to MySQL server onoracle10g安装图解(win7)sql2005安装图解_(sql server2005)安装教程
查看所有0条评论>>