Join (SQL)
SQL clause
A join clause in the Structured Query Language (SQL) combines columns from one or more tables into a new table. The operation corresponds to a join operation in relational algebra. Informally, a join stitches two tables and puts on the same row records with matching fields.
Nº Q2003535 ★★
Uncommon · Knowledge
Join (SQL)
SQL clause
A join clause in the Structured Query Language (SQL) combines columns from one or more tables into a new table. The operation corresponds to a join operation in relational algebra. Informally, a join stitches two tables and puts on the same row records with matching fields.
From Wikipedia
A join clause in the Structured Query Language (SQL) combines columns from one or more tables into a new table. The operation corresponds to a join operation in relational algebra. Informally, a join stitches two tables and puts on the same row records with matching fields. There are several variants of JOIN: INNER, LEFT OUTER, RIGHT OUTER, FULL OUTER, CROSS, and others.
Text: Wikipédia, CC BY-SA 4.0. · Image: GermanX (CC BY-SA 4.0) ·
Related cards
-
Notary
Person licensed by the state to perform acts in legal affairs, in particular witnessing signatures on documents
Nº Q189010 ★★★★
Not listed
-
D
Doubly linked list
Linked list in which each node references both its successor and its predecessor
Nº Q5300179 ★
Not listed
-
P
Process
Set of interrelated tasks that transform inputs into outputs, where the tasks may be carried out by people, nature or machines using various resources
Nº Q10843872 ★★★
Not listed
-
Table (format)
Arrangement of data in rows and columns
Nº Q496946 ★★★
Not listed
-
Microsoft Dynamics 365
Enterprise resource planning software from Microsoft
Nº Q27556059 ★★
Not listed
-
Unanimity
Unity
Nº Q1309409 ★
Not listed
-
Combination
Way of selecting things out of a group where order does not matter
Nº Q202805 ★★★
Not listed
-
SQL injection
Type of code injection, used to attack vulnerable data-driven software applications
Nº Q506059 ★★★
Not listed
-
SQLite
Serverless relational database management system (RDBMS)
Nº Q319417 ★★★
Not listed
-
Directory (computing)
In computing, a file system cataloging structure which contains references to other computer files, and possibly other directories
Nº Q201456 ★★★
Not listed
-
WordNet
Princeton University's computational lexicon of English, a semantic network featuring synsets as nodes connected by hypernymy, hyponymy, holonymy, meronymy, etc.
Nº Q533822 ★
Not listed
-
Sorting
Action of arranging objects into order
Nº Q2303697 ★
Not listed
-
C
Closure (mathematics)
The smallest superset of a given set that is closed under a given operation
Nº Q4720939 ★
Not listed
-
S
Select (SQL)
SQL statement that returns a result set of records from one or more tables
Nº Q1164001 ★★
Not listed
-
Joint Chiefs of Staff
Body of senior uniformed leaders in the U.S. Department of Defense who advise the President on military matters
Nº Q609474 ★★★
Not listed
-
Heap (data structure)
Tree-based data structure in computer science
Nº Q274089 ★★★
Not listed
-
Universe (mathematics)
In set theory, a set large enough such that most ordinary mathematical constructions can take place within it
Nº Q597663 ★★
Not listed
-
A
ACID
Set of properties of database transactions intended to guarantee validity even in the event of errors, power failures, etc.
Nº Q288435 ★★★
Not listed