C#中操作Oracle时的SQL语句参数的用法
C#中操作Oracle时的SQL语句参数的用法
OracleTransaction myTrans ;
conn.Open();
myTrans =conn.BeginTransaction(IsolationLevel.ReadCommitted);
comm.Transaction =myTrans;
comm.CommandText="insert into TagInfo(TagID,AutoSubSysID,TagCode,TagName,TagType,TagValueType,TagMaxValue,TagMinValue,TagAlartMax";
comm.CommandText+=" ,TagAlartMin,TagSaveInterval,TagSaveIgBand,ValidTerm,TimeStampMode,TagAlartPos";
comm.CommandText+=" ,TagAlartPosDes,Description) ";
comm.CommandText+=" values(trim(to_char(SeqTagID.Nextval ,'0000000000')),'0000000100',:TagCode,:TagName,:TagType,:TagValueType,:TagMaxValue,:TagMinValue,:TagAlartMax";
comm.CommandText+=" ,:TagAlartMin,:TagSaveInterval,:TagSaveIgBand,:ValidTerm,:TimeStampMode,:TagAlartPos";
comm.CommandText+=" &n
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using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Data.SqlClient; ......
protected void Button1_Click(object sender, EventArgs e)
{
SqlConnection conn= new SqlConnection("server=(local);database=colorring;uid=sa;pwd=;");
conn.Open();
string sqlstr = "exec master..xp_cmdshell 'bcp \"select top 100 * from master..aps\" queryout c:\\aa ......
Create PROCEDURE [dbo].[ChangeObjectOwner]
@OldOwner as NVARCHAR(128),
@NewOwner as NVARCHAR(128)
AS
DECLARE @Name as NVARCHAR(128)
DECLARE @Owner as NVARCHAR(128)
DECLARE @OwnerName as NVARCHAR(128)
DECLARE curObject CURSOR FOR
select 'Name' = name,
'Owner'&n ......
标准的 SQL 的解析顺序为:
(
1
).
from
子句, 组装来自不同数据源的数据
(
2
).
WHERE
子句, 基于指定的条件对记录进行筛选
(
3
).
GROUP
BY
子句, 将数据划分为多个分组
(
4
).使用聚合函数进行计算
(
5
).使用
HAVING
子句筛选分组
(
6
).计算所有的表达式
......
