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This list includes SQL reserved words – aka SQL reserved keywords, [1] [2] as the SQL:2023 specifies and some RDBMSs have added. Reserved words in SQL and related products In SQL:2023 [ 3 ]
In most cases, an index is used to quickly locate the data records from which the required data is read. In other words, the index is only used to locate data records in the table and not to return data. A covering index is a special case where the index itself contains the required data fields and can answer the required data.
Among the components included with ActiveReports are exports to file formats such as PDF, Excel, RTF, Word and others. ActiveReports also includes Visual Studio integrated report designer, and an API that developers use to create customized reports from a variety of data sources. ActiveReports allows to create and work with next types of reports:
The first number of the pair indicates type: −1 – directive type, the second number is ignored, the following line is one of these keywords: BOT – beginning of tuple (start of row) EOD – end of data; 0 – numeric type, value is the second number, the following line is one of these keywords: V – valid; NA – not available; ERROR ...
In SQL, the data manipulation language comprises the SQL-data change statements, [3] which modify stored data but not the schema or database objects. Manipulation of persistent database objects, e.g., tables or stored procedures, via the SQL schema statements, [3] rather than the data stored within them, is considered to be part of a separate data definition language (DDL).
SQL statements are used to perform tasks such as insert data to a database, delete or update data in a database, or retrieve data from a database. Though database systems use SQL, they also have their own additional proprietary extensions that are usually only used on their system.
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Jet, being part of a relational database management system (RDBMS), allows the manipulation of relational databases. [1] It offers a single interface that other software can use to access Microsoft databases and provides support for security, referential integrity, transaction processing, indexing, record and page locking, and data replication.