पूर्ण विकसित HTML पार्सर या UDF के उपयोग के बिना केवल शुद्ध MySQL में यह संभव है जो REGEX_REPLACE फ़ंक्शन को MySQL में आयात करेगा।
चाल एक संख्या जनरेटर का उपयोग करके और html टैग पर बड़ी स्ट्रिंग को विभाजित करने के लिए एक नेस्टेड SUBSTRING_INDEX का उपयोग करके है
यह संख्या जनरेटर 1 से 10.000 तक की संख्या उत्पन्न करेगा
इसलिए "पार्सर" तक का समर्थन करेगा 10.000 टैग अगर आपको और चाहिए तो आपको और जोड़ने की जरूरत है
CROSS JOIN (
SELECT 1 UNION SELECT 2 UNION SELECT 3 UNION SELECT 4 UNION SELECT 5 UNION SELECT 6 UNION SELECT 7 UNION SELECT 8 UNION SELECT 9 UNION SELECT 10
) AS record_[number]
क्वेरी
SELECT
(@number := @number + 1) AS number
FROM (
SELECT 1 UNION SELECT 2 UNION SELECT 3 UNION SELECT 4 UNION SELECT 5 UNION SELECT 6 UNION SELECT 7 UNION SELECT 8 UNION SELECT 9 UNION SELECT 10
) AS record_1
CROSS JOIN (
SELECT 1 UNION SELECT 2 UNION SELECT 3 UNION SELECT 4 UNION SELECT 5 UNION SELECT 6 UNION SELECT 7 UNION SELECT 8 UNION SELECT 9 UNION SELECT 10
) AS record_2
CROSS JOIN (
SELECT 1 UNION SELECT 2 UNION SELECT 3 UNION SELECT 4 UNION SELECT 5 UNION SELECT 6 UNION SELECT 7 UNION SELECT 8 UNION SELECT 9 UNION SELECT 10
) AS record_3
CROSS JOIN (
SELECT 1 UNION SELECT 2 UNION SELECT 3 UNION SELECT 4 UNION SELECT 5 UNION SELECT 6 UNION SELECT 7 UNION SELECT 8 UNION SELECT 9 UNION SELECT 10
) AS record_4
CROSS JOIN ( SELECT @number := 0 ) AS init_user_param
इस SQL कथन का उपयोग html टैग पर विभाजित करने के लिए किया जाएगा
एसक्यूएल स्टेटमेंट
CONCAT(SUBSTRING_INDEX(SUBSTRING_INDEX([large_html_string], ">", [tag_position]), ">", -1), ">") as tag
चाल अब संख्या जनरेटर और एचटीएमएल स्ट्रिंग स्प्लिटिग को गठबंधन करना है। तो [tag_position] संख्या जनरेटर से एक संख्या से भर जाता है।
यह क्रॉस जॉइन के साथ किया जाता है।
क्वेरी
SELECT
*
FROM (
SELECT
CONCAT(SUBSTRING_INDEX(SUBSTRING_INDEX(data, ">", generator.number), ">", -1), ">") as tag
FROM (
SELECT '<p><span><b>C10373 - FIAT GROUP AUTOMOBILES/RAMO DI AZIENDA DI KUEHNE + NAGEL</b></span>
<p>la somma pari a € 400+IVA per l’attività</p>
<p>TELE+ A 20.000 LIRE AL MESE </p>
<li>a mano o via fax al numero +39.00.0.0.0.00.</li>
<p>Il punteggio base sarà incrementato di un <strong>+ </strong>al ricorrere di ciascuna delle seguenti condizioni:</p>
<li><a href="/aaa/gare/CIGZB81E5568D+RDO1560277+Obblighi+contattuali-signed.pdf" title="">Obblighi contrattuali</a></li>
<li><a href="/aaa/gare/CIGZB81E5568D+RDO1560277+Obblighi+contattuali-signed.pdf" title="">Obblighi contrattuali</a></li>
<li><a href="/aaa/gare/CIGZB81E5568D+RDO_1560277Lettera_Invito.pdf" title="">Lettera di invito</a></li>
<li><a href="/aaa/gare/CIGZB81E5568D+RDO1560277+Obblighi+contattuali-signed.pdf" title="">Obblighi contrattuali</a></li>
<li><a href="/aaa/gare/CIGZB81E5568D+RDO1560277+disciplinare+di+gara-signed.pdf" title="">Disciplinare di gara</a></li>
<li><a href="/aaa/gare/CIGZB81E5568D+determina+di+aggiudicazione+58+2017.pdf" title="">Determina di aggiudicazione</a></li>' AS data
) AS record
CROSS JOIN (
SELECT
(@number := @number + 1) AS number
FROM (
SELECT 1 UNION SELECT 2 UNION SELECT 3 UNION SELECT 4 UNION SELECT 5 UNION SELECT 6 UNION SELECT 7 UNION SELECT 8 UNION SELECT 9 UNION SELECT 10
) AS record_1
CROSS JOIN (
SELECT 1 UNION SELECT 2 UNION SELECT 3 UNION SELECT 4 UNION SELECT 5 UNION SELECT 6 UNION SELECT 7 UNION SELECT 8 UNION SELECT 9 UNION SELECT 10
) AS record_2
CROSS JOIN (
SELECT 1 UNION SELECT 2 UNION SELECT 3 UNION SELECT 4 UNION SELECT 5 UNION SELECT 6 UNION SELECT 7 UNION SELECT 8 UNION SELECT 9 UNION SELECT 10
) AS record_3
CROSS JOIN (
SELECT 1 UNION SELECT 2 UNION SELECT 3 UNION SELECT 4 UNION SELECT 5 UNION SELECT 6 UNION SELECT 7 UNION SELECT 8 UNION SELECT 9 UNION SELECT 10
) AS record_4
CROSS JOIN ( SELECT @number := 0 ) AS init_user_param
)
AS generator
)
AS tags
WHERE
tags.tag != '>'
डेमो देखें http://www.sqlfiddle.com/#!9/de2ed/32
अब हमारे पास अलग-अलग रिकॉर्ड के रूप में टैग हैं जो केवल "href" वाले रिकॉर्ड्स के साथ प्रतिस्थापित करना वास्तव में आसान है।
SQL कथन
(
CASE
WHEN
LOCATE("href", tags.tag) > 0
THEN
REPLACE(tags.tag, "+", " ")
ELSE
tags.tag
END
) AS tag
डेमो देखें http://www.sqlfiddle.com/#!9/de2ed/38
अब जब हम जानते हैं कि कैसे बदलना है, तो हम रिकॉर्ड्स को वापस एक स्ट्रिंग में मर्ज करने जा रहे हैं। हम उसके लिए GROUP_CONCAT का उपयोग कर सकते हैं।
क्वेरी
SET SESSION group_concat_max_len = @@max_allowed_packet;
SELECT
GROUP_CONCAT(
CASE
WHEN
LOCATE("href", tags.tag) > 0
THEN
REPLACE(tags.tag, "+", " ")
ELSE
tags.tag
END
SEPARATOR ""
) AS html
FROM (
SELECT
CONCAT(SUBSTRING_INDEX(SUBSTRING_INDEX(data, ">", generator.number), ">", -1), ">") as tag
FROM (
SELECT '<p><span><b>C10373 - FIAT GROUP AUTOMOBILES/RAMO DI AZIENDA DI KUEHNE + NAGEL</b></span>
<p>la somma pari a € 400+IVA per l’attività</p>
<p>TELE+ A 20.000 LIRE AL MESE </p>
<li>a mano o via fax al numero +39.00.0.0.0.00.</li>
<p>Il punteggio base sarà incrementato di un <strong>+ </strong>al ricorrere di ciascuna delle seguenti condizioni:</p>
<li><a href="/aaa/gare/CIGZB81E5568D+RDO1560277+Obblighi+contattuali-signed.pdf" title="">Obblighi contrattuali</a></li>
<li><a href="/aaa/gare/CIGZB81E5568D+RDO1560277+Obblighi+contattuali-signed.pdf" title="">Obblighi contrattuali</a></li>
<li><a href="/aaa/gare/CIGZB81E5568D+RDO_1560277Lettera_Invito.pdf" title="">Lettera di invito</a></li>
<li><a href="/aaa/gare/CIGZB81E5568D+RDO1560277+Obblighi+contattuali-signed.pdf" title="">Obblighi contrattuali</a></li>
<li><a href="/aaa/gare/CIGZB81E5568D+RDO1560277+disciplinare+di+gara-signed.pdf" title="">Disciplinare di gara</a></li>
<li><a href="/aaa/gare/CIGZB81E5568D+determina+di+aggiudicazione+58+2017.pdf" title="">Determina di aggiudicazione</a></li>' AS data
) AS record
CROSS JOIN (
SELECT
(@number := @number + 1) AS number
FROM (
SELECT 1 UNION SELECT 2 UNION SELECT 3 UNION SELECT 4 UNION SELECT 5 UNION SELECT 6 UNION SELECT 7 UNION SELECT 8 UNION SELECT 9 UNION SELECT 10
) AS record_1
CROSS JOIN (
SELECT 1 UNION SELECT 2 UNION SELECT 3 UNION SELECT 4 UNION SELECT 5 UNION SELECT 6 UNION SELECT 7 UNION SELECT 8 UNION SELECT 9 UNION SELECT 10
) AS record_2
CROSS JOIN (
SELECT 1 UNION SELECT 2 UNION SELECT 3 UNION SELECT 4 UNION SELECT 5 UNION SELECT 6 UNION SELECT 7 UNION SELECT 8 UNION SELECT 9 UNION SELECT 10
) AS record_3
CROSS JOIN (
SELECT 1 UNION SELECT 2 UNION SELECT 3 UNION SELECT 4 UNION SELECT 5 UNION SELECT 6 UNION SELECT 7 UNION SELECT 8 UNION SELECT 9 UNION SELECT 10
) AS record_4
CROSS JOIN ( SELECT @number := 0 ) AS init_user_param
)
AS generator
)
AS tags
WHERE
tags.tag != '>'
पूरी क्वेरी के लिए डेमो देखें
http://www.sqlfiddle.com/#!9/de2ed/46ए>