Question

我目前正在做作业，遇到了问题。

我得到一个错误：

信息8135，第16级，状态0，第41行
表级约束或索引未指定表“会话”的列列表。

我已经经历了一百万遍了，但是我找不到问题出在哪里。我相信我在两个表级语句中都指定了列，所以我很茫然。

代码如下：

CREATE TABLE Class
(
    -- Column specifications and constraints--
    ClassID NCHAR(6) NOT NULL,  
    ClassDescription NVARCHAR(50) NOT NULL,

    --Table constraints--
    CONSTRAINT pk_Class_ClassID 
        PRIMARY KEY (ClassID)   --ClassID is the primary key in the Class table, done as a table constraint
)

CREATE TABLE Riders
(
    -- Column specifications and constraints--
    RiderID INT NOT NULL IDENTITY(10, 1)    --RiderID auto-fills in the value, starting at 10, incrementing by 1
        CONSTRAINT pk_Riders_RiderID PRIMARY KEY,   --RiderID is the primary key in the Riders table
    [Name] NVARCHAR(50) NOT NULL
        CONSTRAINT chk_Riders_Name CHECK (LEN([Name]) > 4), --Name must be longer than 4 letters
    ClassID NCHAR(6) NULL,

    --Table constraints--
    CONSTRAINT fk_Riders_Class 
        FOREIGN KEY (ClassID) REFERENCES Class (ClassID)
)

CREATE TABLE [Sessions]
(
    -- Column specifications and constraints--
    RiderID INT NOT NULL,
    BikeID NCHAR(6) NOT NULL,
    SessionDate DATETIME NOT NULL
        CONSTRAINT chk_Sessions_SessionDate CHECK (SessionDate > '1 Sep 2017'), --SessionDate must be AFTER September 1, 2017
    Laps INT NULL,

    -- Table constraints--
    CONSTRAINT pk_Sessions_RiderID_BikeID_SessionDate 
        PRIMARY KEY (RiderID, BikeID, SessionDate), --RiderID, BikeID, SessionDate is the composite primary key for the Sessions table
    INDEX CI_Sessions_RiderID_BikeID ON [Sessions] (RiderID, BikeID)    --Index RiderID and BikeID
)

CREATE TABLE Bikes
(
    -- Column specifications and constraints--
    BikeID NCHAR(6) NOT NULL
        CONSTRAINT chk_Bikes_BikeID CHECK (BikeID LIKE '[0-9][0-9][0-9][HYS]-[AP]') --BikeID in format ###X-A # = 0 - 9, X = H(Honda), Y(Yamaha), S(Suzuki), A = A(AM), P(PM)
        CONSTRAINT pk_Bikes_BikeID PRIMARY KEY, --BikeID is the primary key in the Bikes table
    StableDate DATE NOT NULL
        CONSTRAINT def_Bikes_StableDate DEFAULT GETDATE()
)

ALTER TABLE [Sessions] 
    ADD CONSTRAINT chk_Sessions_Laps CHECK (Laps >= 10)

ALTER TABLE [Sessions] 
    ADD CONSTRAINT fk_Sessions_Riders 
        FOREIGN KEY (RiderID) REFERENCES Riders (RiderID)

ALTER TABLE [Sessions] 
    ADD CONSTRAINT fk_Sessions_Bikes 
        FOREIGN KEY (BikeID) REFERENCES Bikes (BikeID)

感谢您的帮助！

Answer 1

只需从索引定义中删除apply并写为：

df['a_'] = df.a.apply(lambda r: x[r-1])
df['b_'] = df.b.apply(lambda r: x[r-1])

df
# returns:
    time  a  b   a_  b_
0  0.000  6  5  0.5  -1
1  0.008  6  9  0.5   4
2  0.016  1  9 -6.0   4
3  0.024  2  7 -4.0   1
4  0.032  1  5 -6.0  -1

您可以检查使用以下脚本创建的索引：

function drawMealsChartOld(){
$('#btnC').css('background-color','#ffff00');
google.script.run
.withSuccessHandler(function(mObj){
var dt=mObj.dA;
var hA=dt[0];
dt.splice(0,1);
var dA=dt.slice();
var data = new google.visualization.DataTable();
for(var i=0;i<hA.length;i++){
  if(i===0){
    data.addColumn('string',hA[i]);
  }else{
    data.addColumn('number',hA[i]);
  }
}
data.addRows(dA);
var options={
  title:'Meals Grams  (Starts: ' + mObj.start + '  -  Ends: ' + mObj.end + ')',
  fontSize: 14,
  fontName: 'Roman',
  width:640,
  height:350,
  pointSize:3,
  hAxis:{slantedText:true,slantedTextAngle:90,textStyle:{color:'#333300',fontName:'Verdana',fontSize:8,bold:true}},
  legend:{position:'top'},
  chartArea:{left:75,top:75,width:'75%',height:'50%'},
  series:{0: {targetAxisIndex: 0}, 1:{targetAxisIndex: 0}},
  vAxes:[{title:'GRAMS',titleTextStyle:{color:'#0000CC',fontName:'Verdana',fontSize:12,bold:true,italic:false},textStyle:{color:'#0000CC',fontName:'Verdana',fontSize:10,bold:true,italic:false}}]
};
var chart=new google.visualization.LineChart(document.getElementById('mcht'));
//Not interested in emailing this chart I just want to be able to see how the average is doing.
//google.visualization.events.addListener(chart,'click',function(){emailVitalsDialog()});
//google.visualization.events.addListener(chart,'ready',function(){
  //gImgObj['base64Data']=chart.getImageURI().split(',')[1];
  //gImgObj.ready=true;
//});
chart.draw(data,options);
$('#btnC').css('background-color','#ffffff');
})
.getMealsData();
}

Demo here..

创建表时约束或索引SQL的问题

1 个答案: