ALTER TABLE test_table
ADD CONSTRAINT test_table_R01 FOREIGN KEY (parent_id)
REFERENCES test_table (table_id);

Seems to me that the first row can only reference itself, so would have to watch the order...

Are you lookging for something like

SELECT
       CONCAT(s1.Product_code, s2.serialNumber) as newProductCode
       s2.SerialNumber
    ...

Are you lookging for something like

SELECT
       CONCAT(s1.Product_code, s2.serialNumber) as newProductCode
       s2.SerialNumber
    ...

"Select emp.vid,pt,dn,dcode,dcat,dtime,dlocation "

IF you are selecting all the columns from just your base table, and non from the other join tables,  you could try removing the joins and instead employ ...

Thus every row will have this 14 bytes of extra storage , regardless if that row gets updated later?

Defintley looks like this was ChatGpt assisted at the least. Very non specific and lacking use cases.

Having that extra lookup table with unecrypted data will no doubt mean it will require extra column level security at the least. Preventing unauthorized access will be the primary importance.

I have to wonder about moving tables from one schema to another and how that would impact applications accessing established data. I imagine a synonym coming into the equation at...

Finely written article. And well explained, thank you. I do have a question or two.

 with open('c:\data\currencies.csv', 'r') as csv_file:
       ...

Now that I've looked more carefully, the rows are a little over a 1,000 bytes each, most of that in one varchar(1000) field so it probably covers three pages. I'll...

Now that I've looked more carefully, the rows are a little over a 1,000 bytes each, most of that in one varchar(1000) field so it probably covers three pages....

Good article thank you. An important item to note > Microsoft Docs itselft mentions that forced plans are a temporary solution as a optimized plan today may not be the...

Thank you, this is informative.  Throughout I notice the word user and log in/login used interchangably maybe ?

From Microsoft: http://learn.microsoft.com/en-us/sql/t-sql/statements/alter-authorization-transact-sql

"Server objects (such as databases) must be owned by a server...

I think that is a good point.  Review what the developer has actually submitted, not other stuff.  Obviously there are some "It depends" scenarios.  Restricting the blast radius is...

This is indeed an nice high level overview into Redshift. A couple of points I would like to make

1. According to the Aws Redshift documentation, it is best to let...