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SEO Keyword summary for en.wikipedia.org/w/index.php?title=relational_algebra&oldid=1232548339
Keywords are extracted from the main content of your website and are the primary indicator of the words this page could rank for. By frequenty count we expect your focus keyword to be join
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Short Tail Keywords join relational displaystyle |
long Tail Keywords (2 words) relational algebra outer join natural join attribute names r s |
long Tail Keywords (3 words) name empid deptname r and s sally 2241 sales george 3401 finance harry 3415 finance left outer join tuples in r |
en.wikipedia.org On-Page SEO Scan
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relational algebra wikipedia
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wikipedia free encyclopedia displaystyle ssj sjnjin rtimes dots rns smr rnin smin ldots anr sigma varphi wedge lor neg textisfriend truelor textisbusinesscontact truetextaddressbook rho abr isfriendtextaddressbook rbowtie sleftrcup vert rin land sin mathit funrcup sright trho xmcmsrho xmcmsldots psigma cmxmrtimes tsigma tldots upi rnc cms skp carbowtie boat atop scriptstyle carpricegeq boatprice bowtie theta rltimes sttin rland exists soperatorname fun tcup operatorname spi anrbowtie scup rpi rnrbowtie stimes omega times snrbowtie fkak forall xforall yforall zleftxyin rwedge yzin rrightarrow xzin rright query plan triangle uses binary joins first then result arsigma asigma brsigma bsigma aland alor arcup artimes abwedge cwedge bwedge drtimes dsigma brtimes arsetminus apsigma arcap prcap ansigma api anrtext where fields asubseteq anpi bmrpi ansubseteq anrcup ppi anp alangle aabbrangle cap langle emptyset aarangle setminus abrho bcrrho acr cdrrho cdrho abrsetminus prho abp abrcup abrcap atimes bcup catimes rcup ssetminus trsetminus wikimedia foundation powered mediawiki
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relation algebra
database theory
algebraic structures
semantics
ef codd
relational
query language
sql
relation
operators
unary operators
tuples
binary operators
union
difference
relational model
normal selection
projection relational algebra
cartesian product
set union
set difference
set theory
set intersection
unary operation
multiset
distinct keyword
propositional formula
atoms
conjunction
disjunction
negation
rename relational algebra
join relational algebra
natural join sql
the armed
binary operator
composition of relations
category theory
fiber product
idempotence
foreign key
predicate
relation
iff
relational operator
complement
join sql outer join
null
aggregate functions
transitive closure
fixpoint queries
query plan
relational database management systems
query optimizer
queries
expression trees
query optimization
idempotent
commutative
distributive
isbl
business system 12
chris date
hugh darwen
table
garciamolina
ullman
widom
d4 programming language
database
logic of relatives
objectrole modeling
projection mathematics
projection set theory
relation composition
relation construction
relational calculus
theory of relations
triadic relation
tuple relational calculus
datalog
codds theorem
unicode
isbn
oclc
codd ef
communications of the acm
s2cid
elizabeth oneil
imieliski t
journal of computer and system sciences
cylindric algebras
objectoriented
keyvalue
columnoriented
documentoriented
widecolumn store
graph
nosql
newsql
inmemory
multimodel
comparison
cloud
blockchainbased database
acid
armstrongs axioms
codds 12 rules
cap theorem
candidate key
superkey
surrogate key
unique key
column
row
view
transaction
transaction log
trigger
index
stored procedure
cursor
partition
concurrency control
data dictionary
query rewriting system
administration
replication
sharding
database models
database normalization
database storage
distributed database
federated database system
referential integrity
objectrelational database
transaction processing
outline
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SEO Advice for en.wikipedia.org
In this section we provide pointers on how you can to optimize your web page so it can be found more easily by search engines and how to make it rank higher by optimizing the content of the page itself. For each of the individual criteria the maximum score is 100%. A score below 70% is considered to be indication that the page is not complying with general SEO standards and should be evaluated and/or fixed. Not every factor is weighted the same and some are not as important as others. Relatively unimportant factors like meta keywords are not included in the overall score.
Item | Factor | Pointers | |
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PageTitle | 100% | Far too many sites lack a page title. A page title is the first thing that shows in the search results so always use the title element. | |
Title relevance | 87% | A title should reflect the contents of a site. This site has a 67 % match | |
Title Length | 80% | Limit your title to anywhere between 40 and 70 characters. Your title was 31 characters long | |
Meta Description | 0% | A meta description is the second element that shows in the search results so always use the meta description. | |
Meta description length | 0% | The meta description should be between 145 and 160 characters. This meta description is 1 characters long. | |
Meta description relevance | 0% | Meta Description should reflect the contents of a site. This site has a 0 % match | |
Number of internal links | 30% | Linking to internal pages makes pages easier to find for search engines. Try to keep the number of links on your page roughly below 100. There are 241 internal links on this page. | |
Folder structure | 100% | We found a folder structure in the links on your page. A good folder structure makes a site easier to navigate. We found 3 level 1 folders and 5 folders above or in the first level of navigation. | |
Headings | 55% | Headers should reflect the contents of a site. This site has a 24 % match | |
Links | 10% | Link anchors should to some degree reflect the contents of a site. This site has a 5 % match | |
Image alt tags | 14% | Image alt tags should to some degree reflect the contents of a site. This site has a 5 % match | |
Bold and italic | 45% | Bold and italic tags should reflect the contents of a site to some degree. This site has a 15 % match | |
Html ratio | 60% | Try to keep the html / text ratio as low as possible. More html means longer loading times. Layout should be handled in a serpate css file | |
Image descriptions | 89% | 89.473684210526 % of all images have been described via the "alt" attribute. Describing images with relevant text may lead to better results in the search engines. | |
Page errors | 100% | Pages with no errors display significantly faster on most browsers. We detected 0 errors and warnings | |
WordCount | 20% | An ideal page contains between 400 and 600 words.This page contains 7414 words | |
Server response time | 30% | A slow server slows down a website. This server responds 1182.29% slower the average | |
Gzip compression | 30% | This site does not use Gzip compression. Pages may not display as fast as they could | |
Keywords in Domainname | 30% | There are no important keywords in your domain name | |
Keywords in domain path | 20% | There are no important keywords in the domain path | |
Structured Data | 100% | Structured data makes it easier for search engines to index your website | |
Inline css | 0% | Do not use inline css declarations. Inline css will slow down the rendering of the website. We detected 236 inline style declarations ( <a style="color:green">) with a size of 7505 bytes | |
Excessive use of the same words | 100% | There is no indication that there are one or more keywords that are used excessively. | |
Frames or iframes | 100% | Perfect, detected not (i)frames on your webpagina | |
Flash | 100% | Perfect, we detected no flash objects on your page | |
Css | 30% | We detected too much (2) CSS files on your page. Css files block the loading of a webpage. | |
Javascript | 100% | Perfect, we did not detect too many blocking JavaScript files | |
Mobile Website | 100% | Perfect, we found a responsive design for mobile users | |
Most important heading | 100% | Perfect, we detected a correct use of the most important (h1) heading! | |
Normalized headings | 40% | We dit not font a normalized heading structure. A heading 2 (h2) for example should be followed by a heading of an equal level (h2), a child heading (h3) or even a aprent heading (h1). |
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en.wikipedia.org images and descriptions
70 images found at en.wikipedia.org Images can improve the user experience for a website by making a pag visually appealing Images can also add extra keyword relevance to a webpage by using alt tags. Images can also slow down a website. If the width and height for a picture is not specified for a browser know in advance how large the image is. A browser must first load the picture and see before it knows how much space should be on the page. Upon reservation In the meantime, the browser can do little but wait. When the height and width for the plate are given in the HTML code, a browser just continues to build for a page while the images load in the background.
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https://wikimedia.org/api/rest_v1/media/math/render/svg/21e59bc1d4142ad1f4ee90bac9b8459b6a5f30c7 height: height attribute not set width: width attribute not set description: {\displaystyle \pi _{a}(\{\langle a=a,b=b\rangle \})\cap \pi _{a}(\{\langle a=a,b=b'\rangle \})=\{\langle a=a\rangle \}} |
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https://wikimedia.org/api/rest_v1/media/math/render/svg/8bb2c62cf510226e2c50c3b13bcac5baf56042e0 height: height attribute not set width: width attribute not set description: {\displaystyle \pi _{a}(\{\langle a=a,b=b\rangle \}\setminus \{\langle a=a,b=b'\rangle \})=\{\langle a=a\rangle \}} |
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https://wikimedia.org/api/rest_v1/media/math/render/svg/3e883d041f15b91daf775bc70d4ae495feb9f588 height: height attribute not set width: width attribute not set description: {\displaystyle \pi _{a}(\{\langle a=a,b=b\rangle \})\setminus \pi _{a}(\{\langle a=a,b=b'\rangle \})=\emptyset \,,} |
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https://wikimedia.org/api/rest_v1/media/math/render/svg/a6bdfa6b9e88f9821eb5ffa2f680d8d9d8bf8738 height: height attribute not set width: width attribute not set description: {\displaystyle \rho _{a/b}(\rho _{b/c}(r))=\rho _{a/c}(r)\,\!} |
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https://wikimedia.org/api/rest_v1/media/math/render/svg/98f1641d2a57c0c603178c04ac5703a85de990a2 height: height attribute not set width: width attribute not set description: {\displaystyle \rho _{a/b}(\rho _{c/d}(r))=\rho _{c/d}(\rho _{a/b}(r))\,\!} |
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https://wikimedia.org/api/rest_v1/media/math/render/svg/cb1c7d578876376d7c20e895f5d4626381c795c4 height: height attribute not set width: width attribute not set description: {\displaystyle \rho _{a/b}(r\setminus p)=\rho _{a/b}(r)\setminus \rho _{a/b}(p)} |
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https://wikimedia.org/api/rest_v1/media/math/render/svg/f525fffb64796f16aaff65f972cdbe417fbb2b5c height: height attribute not set width: width attribute not set description: {\displaystyle \rho _{a/b}(r\cup p)=\rho _{a/b}(r)\cup \rho _{a/b}(p)} |
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https://wikimedia.org/api/rest_v1/media/math/render/svg/43ae222553c616a4c337602305b9dac04551a0ae height: height attribute not set width: width attribute not set description: {\displaystyle \rho _{a/b}(r\cap p)=\rho _{a/b}(r)\cap \rho _{a/b}(p)} |
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https://wikimedia.org/api/rest_v1/media/math/render/svg/d8d68ce564002d180ffda5f69eb28e012ca87a36 height: height attribute not set width: width attribute not set description: {\displaystyle (a\times b)\cup (a\times c)=a\times (b\cup c)} |
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https://wikimedia.org/api/rest_v1/media/math/render/svg/47bb90bb5ceff80faae30764493fe243e72f9ae4 height: height attribute not set width: width attribute not set description: {\displaystyle (r\cup s)\setminus t=(r\setminus t)\cup (s\setminus t)} |
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