我有一个包含以下列的表：
我使用以下查询计算表中值的数量
select 1, 'Folder' as "Technology", 'Status' as "Name_Event", count(dm1.id) as "number of items", max(TO_CHAR(TO_DATE('20000101','yyyymmdd')+(SYSDATE - dm1.time_event),'hh24:mi:ss')) as "Time in system"
from db dm1 join db dm2 on dm1.id = dm2.id
where dm1.technology = 'Folder' and dm1.name_event = 'status1' and NOT EXISTS(SELECT 1 FROM db dm2 WHERE dm2.name_event = 'status2' and dm2.id = dm1.id)
我做了以下插入
INSERT INTO DB(id, technology, name_event, time_event) VALUES(1,'Folder', 'status1', 01:00:00);
INSERT INTO DB(id, technology, name_event, time_event) VALUES(2,'Folder', 'status1', 01:00:00);
INSERT INTO DB(id, technology, name_event, time_event) VALUES(3,'Folder', 'status1', 01:00:00);
INSERT INTO DB(id, technology, name_event, time_event) VALUES(4,'Folder', 'status1', 01:00:00);
INSERT INTO DB(id, technology, name_event, time_event) VALUES(5,'Folder', 'status1', 01:00:00);
INSERT INTO DB(id, technology, name_event, time_event) VALUES(6,'Folder', 'status1', 01:00:00);
INSERT INTO DB(id, technology, name_event, time_event) VALUES(7,'Folder', 'status1', 01:00:00);
INSERT INTO DB(id, technology, name_event, time_event) VALUES(8,'Folder', 'status1', 01:00:00);
INSERT INTO DB(id, technology, name_event, time_event) VALUES(9,'Folder', 'status1', 01:00:00);
INSERT INTO DB(id, technology, name_event, time_event) VALUES(10,'Folder', 'status1', 01:00:00);
INSERT INTO DB(id, technology, name_event, time_event) VALUES(4,'Folder', 'status2', 02:00:00);
INSERT INTO DB(id, technology, name_event, time_event) VALUES(1,'Folder', 'status2', 03:00:00);
我在状态1中插入10行，并将2移动到状态2.因此，当我执行查询时，状态1中应该有8个项目，但结果是10 ...
我做错了什么？
答案 0 :(得分：1)
在您的查询中，您 <!DOCTYPE html>
<meta charset="utf-8">
<head>
<style>
.bar2 {
fill: #00AF9D;
}
.bar{
fill: #FF5A00;
}
.axis text {
font-family: 'Open Sans', sans-serif;
font-size: 2vw;
color:grey;
}
.axis path, .axis line {
fill: none;
stroke: #000;
shape-rendering: crispEdges;
}
.svg{ position: absolute;
top: 5vh;
left: 5vw;
border: 1px solid #A0A0A0 ;
height: 90vh;
width: 90vw;
border-radius: 25px;
box-shadow: 3vh 3vh 3vh #D8D8D8 ;
background-color:#FFFFFF;}
.lab{ font-family: 'Open Sans', sans-serif;
font-size: 1vw;
color:grey;
}
</style>
</head>
<body>
<script src="http://d3js.org/d3.v3.min.js"></script>
<script>
var w = window.innerWidth;
var h = window.innerHeight;
data = [{
name: "A",
value: 1,
value2: 1
}, {
name: "B",
value: 4,
value2: 5
}, {
name: "C",
value: 17,
value2:18
}, {
name: "D",
value: 30,
value2: 30
}, {
name: "E",
value: 60,
value2: 60
}, {
name: "F",
value: 100,
value2: 100
}]
var margin = {
top: 0.01*h,
right: 0.05*w,
bottom:0.02*h,
left: 0.05*w
},
width = 0.9*w - margin.left - margin.right,
height =0.9*h - margin.top - margin.bottom;
var x = d3.scale.linear()
.range([0, width])
var y = d3.scale.ordinal()
.rangeRoundBands([0, height], .2);
var xAxis = d3.svg.axis()
.scale(x)
.orient("bottom");
var svg = d3.select("body").append("svg")
.attr("width", width + margin.left + margin.right)
.attr("height", height + margin.top + margin.bottom)
.attr("class","svg")
.append("g")
.attr("transform", "translate(" + margin.left + "," + margin.top + ")");
x.domain([-100,100])
y.domain(data.map(function (d) {
return d.name;
}));
svg.selectAll(".bar")
.data(data)
.enter().append("rect")
.attr("class", "bar")
.attr("x", function (d) {return x(Math.min(0, d.value));})
.attr("y", function (d) {return y(d.name);})
.attr("width", function (d) {return Math.abs(x(d.value) - x(0));})
.attr("height", y.rangeBand())
.on("mouseover", function(){return tooltip.style("visibility", "visible");})
.on("mousemove", function(){return tooltip.style("top", (event.pageY-10)+"px").style( "left",(event.pageX+10)+"px");})
.on("mouseout", function(){return tooltip.style("visibility", "hidden");});
svg.selectAll("text")
.data(data)
.enter()
.append("text")
.attr("class", "lab")
.text(function (d){return d.value+"%";})
.attr("text-anchor", "middle")
.attr("font-family", "sans-serif")
.attr("font-size", "10px")
.attr("fill", "black")
.attr("x", function (d) {return x(Math.min(0, d.value))+(Math.abs(x(d.value) - x(0))/2);})
.attr("y", function (d) {return y(d.name) + (y.rangeBand())/2 ;})
svg.selectAll(".bar2")
.data(data)
.enter().append("rect")
.attr("class", "bar2")
.attr("x", function (d) {return x(Math.min(0, -d.value2));})
.attr("y", function (d) {return y(d.name);})
.attr("width", function (d) {return Math.abs(x(-d.value2) - x(0));})
.attr("height", y.rangeBand())
.on("mouseover", function(){return tooltip.style("visibility", "visible");})
.on("mousemove", function(){return tooltip.style("top", (event.pageY-10)+"px").style( "left",(event.pageX+10)+"px");})
.on("mouseout", function(){return tooltip.style("visibility", "hidden");});
svg.selectAll("text1")
.data(data)
.enter()
.append("text")
.attr("class", "lab")
.text(function (d){return d.value2+"%";})
.attr("text-anchor", "middle")
.attr("font-family", "sans-serif")
.attr("font-size", "10px")
.attr("fill", "black")
.attr("x", function (d) {return x(Math.min(0, -d.value2))+(Math.abs(x(-d.value2) - x(0))/2);})
.attr("y", function (d) {return y(d.name)+(y.rangeBand())/2;});
svg.append("g")
.attr("class", "x axis")
.call(xAxis)
.attr("transform", "translate(0," + (height -margin.bottom) + ")");
svg.append("g")
.attr("class", "y axis")
.append("line")
.attr("x1", x(0))
.attr("x2", x(0))
.attr("y2", height -margin.bottom);
svg.append("g")
.attr("class", "y axis")
.append("line")
.attr("x1", x(0))
.attr("x2", x(0))
.attr("y2", height -margin.bottom);
function type(d) {
d.value = +d.value;
return d;
};
//////////////////////////Tool Tip///////////////////////////////////
var tooltip = d3.select("body")
.append("div")
.style("position", "absolute")
.style("z-index", "10")
.style("visibility", "hidden")
//.text(function (d){return d.value2+"%";})
.text("tooltip")
</script>
</body>
</html>
join，但随后使用dm2相关子查询（并在该子查询中使用相同的别名）。我无法通过我的设置复制问题，但这确实会让人感到困惑！所以试试没有db的第二个副本，只需保留NOT EXISTS：
NOT EXISTS答案 1 :(得分：0)
您在表中使用了2个以上的插入，因此现在您有10 + 2个总共12个插入，以移动数据，使用更新语句。
update db set name_event='status2' where id=4;
update db set name_event='status4' where id=1;