-- Sqlite3 与ms sql server的实际应用中常用的Transact-SQL差异
 

-- 1、空值
SELECT rowid
       com_id, 
       customer_id, 
       corp_sim_name,  ( case when tel_no is NULL then '' else ltrim(rtrim(tel_no)) end ) as tel_no,
       strftime('%Y.%m.%d %H:%M:%f',mainten_datetime,'localtime') as mainten_datetime,mainten_datetime as mainten_datetime1
FROM   Sdf00504
where  (tel_no is NULL) and strftime('%Y.%m.%d %H:%M:%f',mainten_datetime,'localtime')
  <=strftime('%Y.%m.%d %H:%M:%f','2018-05-28 10:09:11.000','localtime');

-- 2、时间截
-- 2.1、Sqlite3
select strftime('%Y.%m.%d %H:%M:%f','now','localtime') from Sdf00504;  -- localtime ：兼容IOS下，本地时间的时差同步 ，now :数据库前时间，注意：引号
select strftime('%Y.%m.%d %H:%M:%f',mainten_datetime,'localtime'),corp_sim_name,  ( case when tel_no is NULL then '' else ltrim(rtrim(tel_no)) end ) as tel_no from Sdf00504  -- mainten_datetime ：表字段，不用引号
where  (tel_no is NULL) and strftime('%Y.%m.%d %H:%M:%f',mainten_datetime,'localtime')
  <=strftime('%Y.%m.%d %H:%M:%f','2018-05-28 10:09:11.000','localtime');
-- 2.2、ms sql server
select tel_no,corp_sim_name,  ( case when tel_no is NULL then '' else ltrim(rtrim(tel_no)) end ) as tel_no from Sdf00504
where  (tel_no is NULL) and convert(varchar(23),mainten_datetime,121) <='2018-05-28 10:09:11.000'  

-- 3、查询结果咧：增加行序号：Sqlite3自带默认 rowid 列，ms sql server需要使用临时表
-- 3.1、Sqlite3
 select rowid,  com_id,ivt_oper_listing,sd_date,BillDate, ( case when store_struct_id is NULL then '' else ltrim(rtrim(store_struct_id)) end ) as      store_struct_id,clerk_id,  CashAmount,i_AMount,RealAmount,ChangeAmount,sumoq, c_memo,corp_name,tel_no,dept_id,comfirm_flag  
 from pos_bill 

-- 3.2、ms sql server
-- 创建临时表：
 select identity(int,1,1) as rowid,  com_id,ivt_oper_listing,sd_date,BillDate, ( case when store_struct_id is NULL then '' else ltrim(rtrim(store_struct_id)) end ) as store_struct_id,clerk_id,  CashAmount,i_AMount,RealAmount,ChangeAmount,sumoq, c_memo,corp_name,tel_no,dept_id,comfirm_flag  into #temp83110089609817889975420987085 from PosBill where (1=1) and (convert(varchar(23),sd_date,121)>='2016-01-23 08:00:00.000')  and (convert(varchar(23),sd_date,121) <'2016-01-23 10:00:00.000')
-- 查询临时表：
 select rowid,  com_id,ivt_oper_listing,sd_date,BillDate, ( case when store_struct_id is NULL then '' else ltrim(rtrim(store_struct_id)) end ) as store_struct_id,clerk_id,  CashAmount,i_AMount,RealAmount,ChangeAmount,sumoq, c_memo,corp_name,tel_no,dept_id,comfirm_flag  from #temp83110089609817889975420987085 where (1=1) and (convert(varchar(23),sd_date,121)>='2016-01-23 08:00:00.000')  and (convert(varchar(23),sd_date,121) <'2016-01-23 10:00:00.000') and (rowid>0) and  (rowid<=800) 
-- 用完后，及时删除临时表：
 drop table #temp83110089609817889975420987085

-- 4、自增长字段及主键设置：
-- 4.1、Sqlite3 ：
/* Disable foreign keys */
PRAGMA foreign_keys = 'off';
/* Database properties */
PRAGMA auto_vacuum = 0;
PRAGMA encoding = 'UTF-8';
PRAGMA page_size = 4096;
/* Drop table [CtL00001] */
DROP TABLE IF EXISTS [main].[CtL00001];
/* Table structure [CtL00001] */
CREATE TABLE [main].[CtL00001](
  [id] "[int] IDENTITY"(1, 1) NOT NULL, 
  [c_tablename] varchar(300) PRIMARY KEY ASC ON CONFLICT ABORT NOT NULL, -- 主键
  [c_tableTitle] varchar(300), 
  [c_type] char(1), 
  [c_use] char(1), 
  [LastTime_UpdateData] datetime, 
  [LastTime_Product] datetime);
/* Enable foreign keys */
PRAGMA foreign_keys = 'on';

-- 4.2、ms sql server
if exists (select * from dbo.sysobjects where id = object_id(N'[dbo].[CtL00001]') and OBJECTPROPERTY(id, N'IsUserTable') = 1)
drop table [dbo].[CtL00001]
GO
CREATE TABLE [dbo].[CtL00001] (
    [id] [int] IDENTITY (1, 1) NOT NULL ,
    [c_tablename] [varchar] (300) COLLATE Chinese_PRC_CI_AS NOT NULL ,
    [c_tableTitle] [varchar] (300) COLLATE Chinese_PRC_CI_AS NULL ,
    [c_type] [varchar] (50) COLLATE Chinese_PRC_CI_AS NULL ,
    [c_use] [varchar] (50) COLLATE Chinese_PRC_CI_AS NULL ,
    [LastTime_UpdateData] [datetime] NULL ,
    [LastTime_UpdateStruct] [datetime] NULL ,
    [LastTime_Product] [datetime] NULL 
) ON [PRIMARY]
GO
ALTER TABLE [dbo].[CtL00001] WITH NOCHECK ADD 
    CONSTRAINT [PK_CtL00001] PRIMARY KEY  CLUSTERED 
    (
        [c_tablename]
    )  ON [PRIMARY] 
GO