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11 relations: Data definition language, Database, Database trigger, Foreign key, Many-to-many (data model), Referential integrity, Result set, SQL, Table (database), Truncate (SQL), Where (SQL).
Data definition language
A data definition language or data description language (DDL) is a syntax similar to a computer programming language for defining data structures, especially database schemas.
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Database
A database is an organized collection of data, stored and accessed electronically.
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Database trigger
A database trigger is procedural code that is automatically executed in response to certain events on a particular table or view in a database.
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Foreign key
In the context of relational databases, a foreign key is a field (or collection of fields) in one table that uniquely identifies a row of another table or the same table.
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Many-to-many (data model)
In systems analysis, a many-to-many relationship is a type of cardinality that refers to the relationship between two entities A and B in which A may contain a parent instance for which there are many children in B and vice versa.
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Referential integrity
Referential integrity is a property of data stating references within it are valid.
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Result set
A SQL result set is a set of rows from a database, as well as metadata about the query such as the column names, and the types and sizes of each column.
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SQL
SQL (S-Q-L, "sequel"; Structured Query Language) is a domain-specific language used in programming and designed for managing data held in a relational database management system (RDBMS), or for stream processing in a relational data stream management system (RDSMS).
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Table (database)
A table is a collection of related data held in a structured format within a database.
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Truncate (SQL)
In SQL, the TRUNCATE TABLE statement is a (DDL) operation that marks the extents of a table for deallocation (empty for reuse).
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Where (SQL)
A WHERE clause in SQL specifies that a SQL Data Manipulation Language (DML) statement should only affect rows that meet specified criteria.
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