Columns that are calculated rather than stored, such as Contact Age. These are defined in a Table and may be used in Views. In MP, Calculated Columns are named with a double underscore, such as the __Age field in Contacts. They are not editable.
An attribute of a record stored in a table.
A subquery which refers back to the parent query for part of its criteria. In Views, subqueries are almost always correlated.
A Field represents a column in a View. These can be columns in a table or calculated values. You may often hear this term used interchangeably with Column, but a column is only one type of Field.
When a record in one Table is related to record in another table, a special column is defined in the first table which requires a Primary Key value from the second table. This is called a Foreign Key. It is called “Foreign” because it points to the key of a “foreign” table. Some Foreign Key columns are optional, so that a NULL may exist in the record instead of a key when no relationship exists for the record.
In SQL, a function returns a single value and may be used in place of a field or value. A function may take one or more parameters which are used to calculate the value.
Each record in a Table has a unique Identifier stored in a special column known as the Primary Key column. These values in a record is called a Primary Key. In MP, the Primary Key Column is the first field and named for the table with “_ID” appended. It is called “Primary” because it is the most important key in a table or record. In MP, Primary Keys are auto-incrementing integers.
A Record is a single row in a table. In MP, Views can only show one row per record at most. Usually, a View will show fewer than one row per record because of the filter clause.
In Relational Databases, data is structured in related Tables. Each table holds a particular type of record and these are related through special columns known as Primary and Foreign Keys.
A Row represents one record in a table.
A query inside another query.
A Table is a collection of related records stored in a highly structured format. Data is stored in columns and rows. Each row represents a record, and each column represents an attribute of the record. In MP, a Page represents a Table.
A Query which uses calculations and filters to show one “view” of an underlying table (or tables). In MP, Views represent different ways of looking at a table. Views can be pre-sorted in a particular order, filtered for particular values, and display fields from related tables.
An MP-specific syntax used to represent table relationships. This functions as a SQL extension when creating Views, Pages, Sub-Pages, Processes, etc.
