F:\oracle\ora90\network\ADMIN\tnsnames.ora.
//---------------------------------------------------------------------------#ifndef Unit1H#define Unit1H//---------------------------------------------------------------------------#include <Classes.hpp>#include <Controls.hpp>#include <StdCtrls.hpp>#include <Forms.hpp>#inclu
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
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
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