Finden Sie die häufigsten Wörter in großen MySQL-Datenbank

Question

Ich habe eine alte MySQL-Datenbank, die mehr als 4.000.000 Zeilen in einer einzigen Spalte enthält. Jede Zeile enthält einen Geschäftsnamen, von denen viele natürlich mehr als ein Wort enthalten.

Ich möchte die Top 1000 häufigsten Wörter in dieser gesamten Datenbank herausfinden. Ist dies mit einer MySQL-Abfrage möglich?

Answer 1

Betrachten Sie das folgende Beispiel ...

CREATE TABLE soliloquy 
(line_number INT NOT NULL AUTO_INCREMENT PRIMARY KEY 
,line VARCHAR(255) NOT NULL 
); 

INSERT INTO soliloquy (line) VALUES 
("To be, or not to be, that is the question:"), 
("Whether 'tis nobler in the mind to suffer"), 
("The slings and arrows of outrageous fortune,"), 
("Or to take Arms against a Sea of troubles,"), 
("And by opposing end them: to die, to sleep"), 
("No more; and by a sleep, to say we end"), 
("the heart-ache, and the thousand natural shocks"), 
("that Flesh is heir to? 'Tis a consummation"), 
("devoutly to be wished. To die, to sleep,"), 
("To sleep, perchance to Dream; aye, there's the rub,"), 
("for in that sleep of death, what dreams may come,"), 
("when we have shuffled off this mortal coil,"), 
("must give us pause. There's the respect"), 
("that makes Calamity of so long life:"), 
("For who would bear the Whips and Scorns of time,"), 
("the Oppressor's wrong, the proud man's Contumely,"), 
("the pangs of despised Love, the Law’s delay,"), 
("the insolence of Office, and the spurns"), 
("that patient merit of the unworthy takes,"), 
("when he himself might his Quietus make"), 
("with a bare Bodkin? Who would Fardels bear,"), 
("to grunt and sweat under a weary life,"), 
("but that the dread of something after death,"), 
("the undiscovered country, from whose bourn"), 
("no traveller returns, puzzles the will,"), 
("and makes us rather bear those ills we have,"), 
("than fly to others that we know not of."), 
("Thus conscience does make cowards of us all,"), 
("and thus the native hue of Resolution"), 
("Is sicklied o'er, with the pale cast of Thought,"), 
("And enterprises of great pitch and moment,"), 
("with this regard their Currents turn awry,"), 
("And lose the name of Action. Soft you now,"), 
("The fair Ophelia? Nymph, in thy Orisons"), 
("Be all my sins remember'd"); 

Folgenden wird eine Zählung, wie viele Zeilen ist jedes Wort innerhalb erscheint - so etwas anders aus, wie oft jedes Wort erscheint ...

Oh, und ints ist nur eine Tabelle ganzer Zahlen [i] (0-9) ...

SELECT word 
    , COUNT(*) total 
    FROM 
    (SELECT DISTINCT line_number 
        , SUBSTRING_INDEX(SUBSTRING_INDEX(line,' ',i+1),' ',-1) word 
        FROM soliloquy 
        , ints 
    ) x 
GROUP 
    BY word 
HAVING COUNT(*) > 3 
ORDER 
    BY total DESC 
    , word; 

+------+-------+ 
| word | total | 
+------+-------+ 
| the | 18 | 
| of | 14 | 
| and | 11 | 
| To |  9 | 
| that |  7 | 
| a |  5 | 
| we |  4 | 
+------+-------+ 

oh, und es gibt wahrscheinlich einige kleine Fehler in Bezug auf die Zeichensetzung - aber Sie sollten die Idee.

Answer 2

Variation von Strawberry's Antwort, arbeiten und im Einsatz auf einer Unternehmens-Website Admin-Panel.

<?php 
global $con; 
$i = 1; 

echo "Most Popular Searches"; 
$select = "select *, COUNT(*) total from mytable group by mytablecolumn having count(*) > 3 order by total desc"; 

$connect = mysqli_query($con, $select); 
while($row=mysqli_fetch_array($connect)) { 
$words = $row['mytablecolumn']; 
echo "$i: $words<br/>"; 
$i++; 
} 
?>