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MS SQL Server supports trigger for DML and DDL statement plus special trigger "logon". The scope of DDL triggers can be a database (CREATE TRIGGER name ON DATABASE ...) or the entire SQL Server instance (CREATE TRIGGER name ON ALL SERVER). When you use the entire instance, you can capture all events executed on commands that have server-level scop
CREATE TRIGGER HistoryTable ON OriginalTable FOR INSERT, DELETE, UPDATE AS DECLARE ... (Db2, MySQL) do not support that the same trigger can be attached to more than ...
Programs calling a database that accords to the SQL standard receive an indication of the success or failure of the call. This return code - which is called SQLSTATE - consists of 5 bytes.
Stored Procedure and Trigger Language Microsoft SQL Server: Transact-SQL and various .NET Framework languages MySQL, MariaDB: own stored procedures, closely adhering to SQL/PSM standard NuoDB: SQL or Java: OpenLink Virtuoso: Virtuoso SQL Procedures (VSP); [2] also extensible via Java, C, and other programming languages Oracle: PL/SQL or Java ...
In this approach, triggers log events that happen to the transactional table into another queue table that can later be "played back". For example, imagine an Accounts table, when transactions are taken against this table, triggers would fire that would then store a history of the event or even the deltas into a separate queue table.
The syntax of the SQL programming language is defined and maintained by ISO/IEC SC 32 as part of ISO/IEC 9075.This standard is not freely available. Despite the existence of the standard, SQL code is not completely portable among different database systems without adjustments.
MySQL (/ ˌ m aɪ ˌ ɛ s ˌ k juː ˈ ɛ l /) [6] is an open-source relational database management system (RDBMS). [6] [7] Its name is a combination of "My", the name of co-founder Michael Widenius's daughter My, [1] and "SQL", the acronym for Structured Query Language.
Most triggers are only activated by either INSERT or UPDATE statements. Triggers are fully supported and can be attached to tables. Triggers can be per-column and conditional, in that UPDATE triggers can target specific columns of a table, and triggers can be told to execute under a set of conditions as specified in the trigger's WHERE clause.