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October 19, 2012 06:59
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body { | |
padding: 0; | |
margin: 0; | |
color: hsla(47,1%,16%,1); | |
background: hsla(10,0%,96%,1); | |
min-height: 100%; | |
font-family: 'Archivo Narrow', sans-serif; | |
} | |
body p { | |
padding: 0 0 0 1rem; | |
} | |
.container { | |
padding: 1rem; | |
width: 28%; | |
float: left; | |
display: ; | |
position: relative; | |
} | |
.code { | |
font-family: 'Droid Sans Mono', sans-serif; | |
font-size: .8rem; | |
border-radius: .5rem; | |
color: hsla(9,18%,27%,1); | |
background: linear-gradient(0deg, hsla(0,0%,0%,.02), hsla(0,0%,0%,.03)); | |
padding: 1rem; | |
margin: -.5rem 0 2rem 0; | |
box-shadow: 0 -8px 4px 0 hsla(0,0%,100%,1), | |
0 1px 0 0 hsla(0,0%,100%,1), | |
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<link href='http://fonts.googleapis.com/css?family=Archivo+Narrow|Droid+Sans+Mono' rel='stylesheet' type='text/css'> | |
<div class="container"> | |
<p>COUNT zählt Datensätze.</p> | |
<div class="code">SELECT COUNT(*)<br/> | |
FROM ARTIKEL<br/> | |
WHERE KATEGORIE = 'Getränke'</div> | |
</div> | |
<div class="container"> | |
<p>AS definiert ein Synonym.</p> | |
<div class="code">SELECT COUNT(*) AS Anzahl_Getränke<br/> | |
FROM ARTIKEL<br/> | |
WHERE KATEGORIE = 'Getränke'</div> | |
</div> | |
<div class="container"> | |
<p>Gesamtzahl der Datensätze in einer Tabelle: mit teuerstem Artikel.</p> | |
<div class="code">SELECT COUNT(*) AS Anzahl<br/> | |
FROM ARTIKEL<br/> | |
WHERE KATEGORIE = 'Getränke'<br/> | |
SELECT MAX(Listenpreis)<br/> | |
FORM Artikel</div> | |
</div> | |
<div class="container"> | |
<p>Günstigsten Artikel pro Kategorie.</p> | |
<div class="code">SELECT Min(Listenpreis) AS billigst,Kategorie<br/> | |
FROM ARTIKEL<br/> | |
GROUP BY KATEGORIE</div></div> | |
<div class="container"> | |
<p>Mittlerer Mindestbestand (weiter Möglichkeiten: MIN, AVG, STDDEV (Standardabweichung), SUM).</p> | |
<div class="code">SELECT AVG(Mindestbestand)<br/> | |
FROM ARTIKEL<br/></div> | |
</div> | |
<div class="container"> | |
<p>Eckige Klammern dienen der Kapselung von Bezeichnern (z.B. wegen Sonderzeichen). Zähle Anzahl Kunden pro Bundesland/Kanton.</p> | |
<div class="code">SELECT COUNT(*) AS Anzahl, [Bundesland/Kanton]<br/> | |
FROM Kunden<br/> | |
GROUP BY [Bundesland/Kanton] | |
</div> | |
</div> | |
<div class="container"> | |
<p>Alle Getränke sortiert nach Preis.</p> | |
<div class="code">SELECT *<br/> | |
FROM ARTIKEL<br/> | |
WHERE Kategorie = 'Getränke'<br/> | |
ORDER BY Listenpreis</div> | |
</div> | |
<div class="container"> | |
<p>Standardreihenfolge ist aufsteigend (ASCENDING <i>{ASC}</i>). Absteigend ist:</p> | |
<div class="code">ORDER BY Listenpreis <b>DESC</b></div> | |
</div> | |
<div class="container"> | |
<p>Datumsangaben in WHERE-Klauseln (in Access: Datum im amerikan. Format angeben).</p> | |
<div class="code">SELECT *<br/> | |
FROM Bestellungen<br/> | |
WHERE Bestelldatum > #02/01/2006#<br/> | |
ORDER BY Listenpreis</div> | |
</div> | |
<div class="container"> | |
<p>Z.B. alle im März 2006.</p> | |
<div class="code">SELECT *<br/> | |
FROM Bestellungen<br/> | |
WHERE Bestelldatum BETWEEN #03/01/2006# AND #03/31/2006#<br/> | |
</div> | |
</div> |
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{"view":"split","fontsize":"100","seethrough":"","prefixfree":"1","page":"result"} |
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