將SQL命令與數據庫匹配

Question

我正在爲客戶端使用webdb，並且希望匹配服務器端數據庫，以便Web應用程序可以脫機使用。這這裏是創建服務器端表中的腳本...

USE [TESTDB] 
GO 

/****** Object: Table [dbo].[tblInternalMobile_SalesCalls] Script Date: 01/08/2013 11:30:31 ******/ 
SET ANSI_NULLS ON 
GO 

SET QUOTED_IDENTIFIER ON 
GO 

SET ANSI_PADDING ON 
GO 

CREATE TABLE [dbo].[tblInternalMobile_SalesCalls](
    [newcall_id] [int] IDENTITY(1,1) NOT NULL, 
    [companyname] [varchar](30) NOT NULL, 
    [comment] [varchar](300) NULL, 
    [dateUTC] [datetime2](7) NOT NULL, 
CONSTRAINT [PK_tblInternalMobile_SalesCalls] PRIMARY KEY CLUSTERED 
(
    [newcall_id] ASC 
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY] 
) ON [PRIMARY] 

GO 

SET ANSI_PADDING OFF 
GO 

我想匹配的客戶端，但周圍的身份，我得到一個錯誤Uncaught Error: [object SQLError], Error Code: 5, Error Message: could not prepare statement (1 near "IDENTITY": syntax error)

這是我的客戶端代碼。 ..

//Database helper 
//I want to use a 'namespace' for this to minimize name conflicts 
var DbHelper = {}; 
//use the webDb 'namespace' so we could use indexDb if need be in the future by making a new 'namespace' 
DbHelper.webDb = {}; 
//To store the database object 
DbHelper.webDb.db = null; 
//Open the database 
DbHelper.webDb.openDb = function() { 
    var dbSize = 5 * 1024 * 1024 //5MB I believe is the max 
    DbHelper.webDb.db = openDatabase("TestDB", "1.0", "Database manager", 5 * 1024 * 1024); 
}; 
//If there is an error its going to throw an error, I havent added any handlers for this, so it should be added where the function is called 
DbHelper.webDb.onError = function(tx, e) { 
    throw "Error: " + e + ", Error Code: " + e.code + ", Error Message: " + e.message; 
}; 
//This should be used if we are doing a non query, where we dont need to use the result 
DbHelper.webDb.onSuccess = function(tx, r) { 
    console.log("Database result: " + r) 
}; 
//Create the tables we are going to use 
DbHelper.webDb.createTables = function() { 
    var db = DbHelper.webDb.db; 
    db.transaction(function(tx) { 
     //I am using the same tables as I am on the server, so we dont confuse things 
     tx.executeSql("CREATE TABLE IF NOT EXISTS tblInternalMobile_SalesCalls(newcall_id INT PRIMARY KEY IDENTITY(1,1), companyname varchar(30), comment varchar(300), dateUTC DATETIME2)", [], DbHelper.webDb.onSuccess, DbHelper.webDb.onError); 
    }); 
} 
DbHelper.webDb.init = function() { 
    DbHelper.webDb.openDb(); 
    DbHelper.webDb.createTables(); 
} 

$(document).ready(function(e) { 
    DbHelper.webDb.init(); 
}); 

爲什麼它不工作？我相信我使用的是正確的語法，顯然不是。

問題是這樣的說法CREATE TABLE IF NOT EXISTS tblInternalMobile_SalesCalls(newcall_id INT PRIMARY KEY IDENTITY(1,1), companyname varchar(30), comment varchar(300), dateUTC DATETIME2)

Answer 1

如果你實際使用的SQL Server或它在客戶端和服務器端的變種之一，你應該使用相同的CREATE TABLE語句。但是，SQL Server不支持CREATE TABLE 如果不存在。

如果您使用的是,deprecated HTML5 interface，那麼您的用戶代理將符合SQLite語法。

CREATE TABLE tblInternalMobile_SalesCalls(
    newcall_id INTEGER PRIMARY KEY AUTOINCREMENT, 
    companyname varchar(30), 
    comment varchar(300), 
    dateUTC DATETIME2 
); 

相信w3.org的Indexed Database API用於替代webdb。