瓜蛋的博客

摘要： //---------------------------------------------------------------------------#ifndef Unit1H#define Unit1H//---------------------------------------------------------------------------#include <Classes.hpp>#include <Controls.hpp>#include <StdCtrls.hpp>#include <Forms.hpp>#inclu 阅读全文

摘要： varss,s: AnsiString;beginss := 'Hello';s := AnsiQuotedStr(ss, '"'); {参数2是定界符, Char 类型}ShowMessage(s); {"Hello"}s := AnsiQuotedStr(ss, '#');ShowMessage(s); {#Hello#}ss := 'Hello#Hello'; {如果中间包含要添加的定界符, 将被双写}s := AnsiQuotedStr(ss, '#');ShowMessage 阅读全文

摘要： oracle的主键约束添加删除1、创建表的同时创建主键约束一、无命名create table accounts (accounts_number number primary key,accounts_balance number);二、有命名 create table accounts (accounts_number number primary key,accounts_balance number,constraint yy primary key(accounts_number));2、删除表中已有的主键约束一、无命名SELECT * FROM USER_CONS_COLUMNS W 阅读全文

摘要： 创建用户create user 用户名identified by 密码default tablespace 表空间temporary tablespace 表空间quoat 整数 K|M |unlimited on 表空间限制用户用户加锁 alter user 用户名 account lock;用户解锁 alter user 用户名 account unlock;用户口令即刻失效alter user 用户名password expire删除用户drop user 用户名 cascadecreate user lisi identified by lisi;显示当前用户:show user;系统 阅读全文

摘要： //---------------------------------------------------------------------------#ifndef Unit1H#define Unit1H//---------------------------------------------------------------------------#include <Classes.hpp>#include <Controls.hpp>#include <StdCtrls.hpp>#include <Forms.hpp>#inclu 阅读全文

摘要： //---------------------------------------------------------------------------#ifndef Unit1H#define Unit1H//---------------------------------------------------------------------------#include <Classes.hpp>#include <Controls.hpp>#include <StdCtrls.hpp>#include <Forms.hpp>#inclu 阅读全文

摘要： //---------------------------------------------------------------------------#ifndef Unit1H#define Unit1H//---------------------------------------------------------------------------#include <Classes.hpp>#include <Controls.hpp>#include <StdCtrls.hpp>#include <Forms.hpp>#inclu 阅读全文

摘要： //---------------------------------------------------------------------------#ifndef Unit1H#define Unit1H//---------------------------------------------------------------------------#include <Classes.hpp>#include <Controls.hpp>#include <StdCtrls.hpp>#include <Forms.hpp>#inclu 阅读全文

摘要： //---------------------------------------------------------------------------#ifndef Unit1H#define Unit1H//---------------------------------------------------------------------------#include <Classes.hpp>#include <Controls.hpp>#include <StdCtrls.hpp>#include <Forms.hpp>#inclu 阅读全文

摘要： //---------------------------------------------------------------------------#ifndef Unit1H#define Unit1H//---------------------------------------------------------------------------#include <Classes.hpp>#include <Controls.hpp>#include <StdCtrls.hpp>#include <Forms.hpp>#inclu 阅读全文