enow.com Web Search

Search results

  1. Results from the WOW.Com Content Network
  2. Update (SQL) - Wikipedia

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

    When using FROM, one should ensure that the join produces at most one output row for each row to be modified. In other words, a target row shouldn't join to more than one row from the other table(s). If it does, then only one of the join rows will be used to update the target row, but which one will be used is not readily predictable. [2]

  3. PL/SQL - Wikipedia

    en.wikipedia.org/wiki/PL/SQL

    Blocks can be nested – i.e., because a block is an executable statement, it can appear in another block wherever an executable statement is allowed. A block can be submitted to an interactive tool (such as SQL*Plus) or embedded within an Oracle Precompiler or OCI program. The interactive tool or program runs the block once.

  4. Database trigger - Wikipedia

    en.wikipedia.org/wiki/Database_trigger

    Column-level trigger: This gets executed before or after the specified column changes. For each row type: This trigger gets executed once for each row of the result set affected by an insert/update/delete. For each statement type: This trigger gets executed only once for the entire result set, but also fires each time the statement is executed.

  5. SQL syntax - Wikipedia

    en.wikipedia.org/wiki/SQL_syntax

    Each column in an SQL table declares the type(s) that column may contain. ANSI SQL includes the following data types. [14] Character strings and national character strings. CHARACTER(n) (or CHAR(n)): fixed-width n-character string, padded with spaces as needed; CHARACTER VARYING(n) (or VARCHAR(n)): variable-width string with a maximum size of n ...

  6. Virtual column - Wikipedia

    en.wikipedia.org/wiki/Virtual_column

    In relational databases a virtual column is a table column whose value(s) is automatically computed using other columns values, or another deterministic expression. Virtual columns are defined of SQL:2003 as Generated Column, [1] and are only implemented by some DBMSs, like MariaDB, SQL Server, Oracle, PostgreSQL, SQLite and Firebird (database server) (COMPUTED BY syntax).

  7. Grimes Says She Didn't See One of Her Kids for 5 Months ... - AOL

    www.aol.com/lifestyle/grimes-says-she-didnt-see...

    Grimes is opening up about the past few months of her life.. The singer, born Claire Boucher, shared a post on X, formally known as Twitter, on Wednesday, Nov. 20, giving an update on the release ...

  8. Change data capture - Wikipedia

    en.wikipedia.org/wiki/Change_data_capture

    Database designers give tables whose changes must be captured a column that contains a version number. Names such as VERSION_NUMBER, etc. are common. One technique is to mark each changed row with a version number. A current version is maintained for the table, or possibly a group of tables.

  9. The Key to Actually Quitting Bad Habits - AOL

    www.aol.com/key-actually-quitting-bad-habits...

    Psychologists explain the evolutionary role of dopamine, the truth about dopamine detoxes and how you can really put an end to bad habits.