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  2. Merge (SQL) - Wikipedia

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

    There is also an IGNORE clause for the INSERT statement, [7] which tells the server to ignore "duplicate key" errors and go on (existing rows will not be inserted or updated, but all new rows will be inserted). SQLite's INSERT OR REPLACE INTO works similarly. It also supports REPLACE INTO as an alias for compatibility with MySQL. [8]

  3. Database index - Wikipedia

    en.wikipedia.org/wiki/Database_index

    A dense index in databases is a file with pairs of keys and pointers for every record in the data file. Every key in this file is associated with a particular pointer to a record in the sorted data file. In clustered indices with duplicate keys, the dense index points to the first record with that key. [3]

  4. Data deduplication - Wikipedia

    en.wikipedia.org/wiki/Data_deduplication

    Source deduplication ensures that data on the data source is deduplicated. This generally takes place directly within a file system. The file system will periodically scan new files creating hashes and compare them to hashes of existing files. When files with same hashes are found then the file copy is removed and the new file points to the old ...

  5. MyISAM - Wikipedia

    en.wikipedia.org/wiki/MyISAM

    The files have names that begin with the table name and have an extension to indicate the file type. MySQL uses a .frm file to store the definition of the table, but this file is not a part of the MyISAM engine; instead it is a part of the server. The data file has a .MYD (MYData) extension. The index file has a .MYI (MYIndex) extension.

  6. Wikipedia talk:Speedy deletion/Archive 5 - Wikipedia

    en.wikipedia.org/wiki/Wikipedia_talk:Speedy...

    Files that have unknown source or copyright status, that have been tagged as such for more than a week. This modified version is less objective, which is a good thing, because there is room for judgement on whether an image has a source and copyright status specified.

  7. Zero-byte file - Wikipedia

    en.wikipedia.org/wiki/Zero-byte_file

    An empty file has a minimum disk size that depends on the disk block size, which can also be referred to as cluster size or IO block size, that depends in turn on the filesystem. This IO block size can be discovered through different utilities in the operating system, such as stat in Unix systems. [2] [3] Typically 4096 bytes.

  8. Stack Overflow - Wikipedia

    en.wikipedia.org/wiki/Stack_Overflow

    In early May 2019, an update was deployed to Stack Overflow's development version. It contained a bug which allowed an attacker to grant themselves privileges in accessing the production version of the site.

  9. Wikipedia:Reference desk/Archives/Miscellaneous/June 2006 ...

    en.wikipedia.org/wiki/Wikipedia:Reference_desk/...

    While I can find the setting for minimum font size, what I really want is to duplicate the effect of the Ctrl+"+" hotkey which enlarges all text, preserving the relative font sizes. Unfortunately, said hotkey isn't persistent across browser sessions.