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関係代数 (関係モデル)

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Wikipedia definition

1. Relational algebraRelational algebra, an offshoot of first-order logic, deals with a set of finitary relations that is closed under certain operators. These operators operate on one or more relations to yield a relation. Relational algebra is a part of computer science.
Read “Relational algebra” on English Wikipedia
Read “関係代数 (関係モデル)” on Japanese Wikipedia
Read “Relational algebra” on DBpedia

0.4071098833193995

14 strokes. JLPT N3. Jōyō kanji, taught in grade 4.

関

connection, barrier, gateway, involve, concerning

Kun: せき、 -ぜき、かか.わる、からくり、かんぬき

On: カン

1.0119588528225074

9 strokes. JLPT N3. Jōyō kanji, taught in grade 3.

係

person in charge, connection, duty, concern oneself

Kun: かか.る、かかり、 -がかり、かか.わる

On: ケイ

0.43182726909236313

5 strokes. JLPT N4. Jōyō kanji, taught in grade 3.

代

substitute, change, convert, replace, period, age, counter for decades of ages, eras, etc., generation, charge, rate, fee

Kun: か.わる、かわ.る、かわ.り、か.わり、 -がわ.り、 -が.わり、か.える、よ、しろ

On: ダイ、タイ

0.43037330522336525

13 strokes. JLPT N3. Jōyō kanji, taught in grade 2.

数

number, strength, fate, law, figures

Kun: かず、かぞ.える、しばしば、せ.める、わずらわ.しい

On: スウ、ス、サク、ソク、シュ

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