CREATE TABLE [dbo].[Tec_Lav](
  [Tecnico] [varchar](4) NOT NULL,
  [Macchina] [varchar](10) NOT NULL,
  [Data_Inizio] [datetime] NOT NULL,
  [Data_Fine] [datetime] NOT NULL,
 CONSTRAINT [PK_Lav_tec] PRIMARY KEY CLUSTERED 
(
  [Tecnico] ASC,
  [Macchina] ASC,
  [Data_Inizio] ASC
)WITH (PAD_INDEX  = OFF, STATISTICS_NORECOMPUTE  = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS  = ON, ALLOW_PAGE_LOCKS  = ON) ON [PRIMARY]
) ON [PRIMARY];


CREATE TABLE [dbo].[Tec_orari](
  [Tecnico] [varchar](4) NOT NULL,
  [DaOra] [datetime] NOT NULL,
  [Aora] [datetime] NOT NULL,
 CONSTRAINT [PK_Tec_orari] PRIMARY KEY CLUSTERED 
(
  [Tecnico] ASC,
  [DaOra] ASC
)WITH (PAD_INDEX  = OFF, STATISTICS_NORECOMPUTE  = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS  = ON, ALLOW_PAGE_LOCKS  = ON) ON [PRIMARY]
) ON [PRIMARY];


INSERT INTO [Tec_orari] ([Tecnico],[DaOra],[Aora])
VALUES ('1213','1900-01-01 07:30:00.000','1900-01-01 13:00:00.000');
INSERT INTO [Tec_orari] ([Tecnico],[DaOra],[Aora])
VALUES ('1213','1900-01-01 14:00:00.000','1900-01-01 16:30:00.000')


INSERT INTO [Tec_Lav] ([Tecnico],[Macchina],[Data_Inizio],[Data_Fine])
VALUES ('1213','Prima','2014-03-13 8:00:00.000','2014-03-14 15:00:00.000');
INSERT INTO [Tec_Lav] ([Tecnico],[Macchina],[Data_Inizio],[Data_Fine])
VALUES ('1213','Seconda','2014-03-14 15:30:00.000','2014-03-17 09:00:00.000')