In SQL Server, you can use the sys.server_trigger_events catalog view to return a list of server trigger events.
More specifically, this view contains one row for each event for which a server-level (synchronous) trigger fires.
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Return a List of All Server Triggers in SQL Server
In SQL Server, you can use the sys.server_triggers catalog view to return a list of server triggers.
More specifically, this view contains the set of all server-level DDL triggers with object_type of TR or TA.
For CLR triggers, the assembly must be loaded into the master database.
Return a List of Triggers in SQL Server
You can use the sys.triggers catalog view to return a list of triggers in a database in SQL Server.
This view contains a row for each object that is a trigger, with a type of TR or TA.
Create a “Last Modified” Column in SQL Server
Some database tables include a “last modified” column, which stores the date and time that the row was last updated. Each time the row is updated, the date is updated to reflect the date and time of that update.
In SQL Server, you can use a trigger to perform this update.
A trigger is a special type of stored procedure that automatically runs when an event occurs in the database server.
You can use the CREATE TRIGGER statement to create a trigger when using T-SQL. This statement can be used to create a DML, DDL, or logon trigger.
How to Test for Overlapping Dates in PostgreSQL
In PostgreSQL, you can use the OVERLAPS operator to test for overlapping time periods.
The function returns true when two time periods (defined by their endpoints) overlap, and false when they do not overlap.
How to Format Numbers as Currency in PostgreSQL
To format a number as currency in Postgres, you can either convert it to the money data type, or use to_char() to convert it to text that includes the appropriate currency symbol.
This obviously assumes that the number isn’t already stored using the money type.
Below are examples of each of these options.
How to Pause the Execution of a Statement in PostgreSQL
PostgreSQL includes three functions that allow you to delay the execution of the server process. the execution of a statement.
In other words, you can run a statement and have it pause half way through, before continuing on its merry way.
The three functions are:
These are all very similar, but they work in slightly different ways.
Below are examples of each one.
Format the Month in Roman Numerals in PostgreSQL
In PostgreSQL, you can use the to_char() function to return dates in various formats.
One of the things you can do with this function is return the month portion of a date in roman numerals.
How to Set the Interval Output Format in PostgreSQL
When working with the interval data type in PostgreSQL, you can change the way the interval output is formatted.
You have a choice of four formats that your intervals can be output in.
Calculate the Age in Years in PostgreSQL
Postgres has the age() function that returns the age in years, months, and days based on two dates.
This works fine unless you only want to return the age in years.
For example, you simply want to return a person’s age based on their birthday. You want something like 32 instead of 32 years 4 mons 67 days, which is what age() is likely to return.
Fortunately there’s an easy way to do this in PostgreSQL.