Jeffrey Yao


SQLServerCentral Article

From DBA to DBAA

Most of us DBAs have worked on our career to get where we are. A DBA is usually a second or third step in IT and we we've looked to advance our understanding of technology. Jeffrey Yao now brings us a new level of database work to which we may aspire.

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2008-05-09 (first published: )

15,670 reads

SQLServerCentral Article

Migrating Database Objects

Not a fun task, although SQL Server 2000 makes the job easier than a few other platforms. Still it's work and it starts to encroach on Jeffrey Yao's two DBA laws having to do with fun at work. Read about his laws and see if you agree and follow along on a real world adventure in migrating hundreds of database objects to a new database.

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2005-05-03

10,464 reads

SQLServerCentral Article

Making good use of Sysforeignkeys table -- Part 2 Check Table Relation

Using sysforeignkeys to discover SQL Server circular relationships. Have you ever tried this? Most of us probably haven't, but Jeffrey Yao often needs to reverse engineer databases for his clients. Here's a followup to his first article where he presents another of his techniques for doing a little detective work in your databases.

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2004-06-30

7,113 reads

SQLServerCentral Article

Making Good Use of Sysforeignkeys Table - Part 1: Display table relati

Sysforeignkeys is a valuable SQL Server resource. How many times have you had to "pick up the pieces" from a database developed by someone else and dropped on your desk? Ever get a database diagram with that? A data dictionary? Probably not too often. Jeffrey Yao has developed a system of finding those parent-child relationships automatically and displaying them so he can get up to speed quickly on these inherited databases. Read on to find out more.

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2004-06-01

11,675 reads

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Question of the Day

The Tightly Linked View

I try to run this code on SQL Server 2022. All the objects exist in the database.

CREATE OR ALTER VIEW OrderShipping
AS
SELECT cl.CityNameID,
       cl.CityName,
       o.OrderID,
       o.Customer,
       o.OrderDate,
       o.CustomerID,
       o.cityId
 FROM dbo.CityList AS cl
 INNER JOIN dbo.[Order] AS o ON o.cityId = cl.CityNameID
GO
CREATE OR ALTER FUNCTION GetShipCityForOrder
(
    @OrderID INT
)
RETURNS VARCHAR(50)
WITH SCHEMABINDING
AS
BEGIN
    DECLARE @city VARCHAR(50);
    SELECT @city = os.CityName
    FROM dbo.OrderShipping AS os
    WHERE os.OrderID = @OrderID;
    RETURN @city;
END;
go
What is the result?

See possible answers