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  2. Database trigger - Wikipedia

    en.wikipedia.org/wiki/Database_trigger

    Using the BEFORE and AFTER options [7] determine when the trigger is called. Suppose you have a trigger that is called on an INSERT to a certain table. If your trigger is using the BEFORE option, the code within the trigger will be executed before the INSERT into the table occurs.

  3. Log trigger - Wikipedia

    en.wikipedia.org/wiki/Log_trigger

    Source: [1] A trigger cannot be attached to more than one operation (INSERT, DELETE, UPDATE), so a trigger must be created for each operation. The old and new values are exposed as fields of a record data structures. The names of these records can be defined, in this example they are named as O for old values and N for new values.

  4. Change data capture - Wikipedia

    en.wikipedia.org/wiki/Change_data_capture

    The most common forms of SCD are type 1 (overwrite), type 2 (maintain history) or 3 (only previous and current value). SCD 2 can be useful if history is needed in the target system. CDC overwrites in the target system (akin to SCD1), and is ideal when only the changed data needs to arrive at the target, i.e. a delta-driven dataset .

  5. Template:Check page on delete - Wikipedia

    en.wikipedia.org/wiki/Template:Check_page_on_delete

    Template: Check page on delete. 1 language. ... Download as PDF; Printable version ...

  6. Template:S-bef - Wikipedia

    en.wikipedia.org/wiki/Template:S-bef

    This template is used on approximately 228,000 pages. To avoid major disruption and server load, any changes should be tested in the template's /sandbox or /testcases subpages, or in your own user subpage. The tested changes can be added to this page in a single edit. Consider discussing changes on the talk page before implementing them.

  7. Template:Querylink - Wikipedia

    en.wikipedia.org/wiki/Template:Querylink

    This template creates an internal link to the specified page (1) with the specified query string (qs) of the form qs=name=value&name2=value2 and optionally the specified caption (2) which defaults to the specified page (1). The intended purpose of this template is to provide the ability to create internal links with a query string component ...

  8. Database normalization - Wikipedia

    en.wikipedia.org/wiki/Database_normalization

    That means that, having data in unnormalized form (the least normalized) and aiming to achieve the highest level of normalization, the first step would be to ensure compliance to first normal form, the second step would be to ensure second normal form is satisfied, and so forth in order mentioned above, until the data conform to sixth normal form.

  9. List of HTTP status codes - Wikipedia

    en.wikipedia.org/wiki/List_of_HTTP_status_codes

    Therefore, HTTP/1.1 added status codes 303 and 307 to distinguish between the two behaviours. [1]: §15.4 303 See Other (since HTTP/1.1) The response to the request can be found under another URI using the GET method. When received in response to a POST (or PUT/DELETE), the client should presume that the server has received the data and should ...