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  2. Hint (SQL) - Wikipedia

    en.wikipedia.org/wiki/Hint_(SQL)

    Oracle implements hints by using specially-crafted comments in the query that begin with a + symbol, thus not affecting SQL compatibility. [2] EDB Postgres Advanced Server (a proprietary version of PostgreSQL from EnterpriseDB) offers hints compatible with those of Oracle. [3] [4] Microsoft SQL Server offers hints via the OPTION keyword [5]

  3. Query plan - Wikipedia

    en.wikipedia.org/wiki/Query_plan

    Some query tools can generate embedded hints in the query, for use by the optimizer. Some databases - like Oracle - provide a plan table for query tuning. This plan table will return the cost and time for executing a query. Oracle offers two optimization approaches: CBO or Cost Based Optimization; RBO or Rule Based Optimization

  4. SQL syntax - Wikipedia

    en.wikipedia.org/wiki/SQL_syntax

    The following example of a SELECT query returns a list of expensive books. The query retrieves all rows from the Book table in which the price column contains a value greater than 100.00. The result is sorted in ascending order by title. The asterisk (*) in the select list indicates that all columns of the Book table should be included in the ...

  5. PL/SQL - Wikipedia

    en.wikipedia.org/wiki/PL/SQL

    PL/SQL refers to a class as an "Abstract Data Type" (ADT) or "User Defined Type" (UDT), and defines it as an Oracle SQL data-type as opposed to a PL/SQL user-defined type, allowing its use in both the Oracle SQL Engine and the Oracle PL/SQL engine. The constructor and methods of an Abstract Data Type are written in PL/SQL.

  6. Hierarchical and recursive queries in SQL - Wikipedia

    en.wikipedia.org/wiki/Hierarchical_and_recursive...

    A hierarchical query is a type of SQL query that handles hierarchical model data. They are special cases of more general recursive fixpoint queries, which compute transitive closures . In standard SQL:1999 hierarchical queries are implemented by way of recursive common table expressions (CTEs).

  7. Jewel Quest Mysteries: Oracle of Ur: A getting started guide

    www.aol.com/news/2012-03-16-jewel-quest...

    Jewel Quest Mysteries: The Oracle of Ur is a Hidden Object/Match-3 game played on the PC created by iWin Games. This walkthrough includes tips and tricks, helpful ... If all hints are used and no ...

  8. Oracle SQL Developer - Wikipedia

    en.wikipedia.org/wiki/Oracle_SQL_Developer

    Oracle SQL Developer worked with IBM Db2, Microsoft Access, Microsoft SQL Server, MySQL, Sybase Adaptive Server, Amazon Redshift and Teradata databases. [4] Oracle SQL Developer supports automatic tabs, code insight, bracket matching and syntax coloring for PL/SQL. Future versions of Oracle SQL Developer will use Visual Studio Code. [1]

  9. Full table scan - Wikipedia

    en.wikipedia.org/wiki/Full_table_scan

    The query is unselective The number of return rows is too large and takes nearly 100% in the whole table. These rows are unselective. These rows are unselective. The table statistics does not update The number of rows in the table is higher than before, but table statistics haven't been updated yet.