This is also true for other DBMS systems when using count(distinct xxx) syntax.
If we need to count the number of distinct records in a group of data such as in each year or in each product category, we need to retrieve all the groups without aggregation in the sub-query and then use GROUP BY on the groups in the outer query. Here we want to count how many distinct customers that ordered products from Northwind each year.
Presentation Bundle Are you tired of installing, configuring and patching Microsoft SQL Server?
9 – How Isolation levels affect transaction behavior. At the end of the talk, you will know how to fix the above scenario by changing the isolation level. This presentation will review techniques on how to prevent and/or audit data and schema changes. The issues with the first design will be examined and corrected with the second design.
Collate a bunch of graphs into a dashboard presentation 8. Azure SQL database maybe a way to move some of your existing infrastructure to the cloud.This version of SQL Server now supports encrypted backups for those security conscious companies. After this presentation, you will be ready to meet that clients need. presentation bundle You just found out that a client needs a SQL database to be designed from scratch. Now, some of them are an integral part of MS Office 2013. 5 – Backup read/write file groups only for data warehouse systems. Upon inspecting the job history, the error code states you have duplicate key values. TSQL provides the developer with several constructs that can store temporary result sets that are passed to the next query in the script. I will be introducing the brother’s grimm database that has the full text of each fairy tale. Coverage: 1 – Using the VARBINARY data type to store the bit pattern. Abstract: Have you ever received a call from a client asking for help when their SQL Server database is corrupted? What if you were a SQL Server developer at a local consulting company tasked with creating a database for a local Boy Scout of America (BSA) Troop, where would you begin?The data explosion of the 21st century has administrators concerned with where to save all those backups. 1 – Files & File Groups 2 – Logins & Users 3 – Security using schemas 4 – Database roles for access. 6 – Default, Check, and NULL constraints 7 – Handling table relationships (PK vs FK). However, you existing DBA has given two week notice. • Power Query • Power Pivot • Power View • Power Map It is not surprising that these four business intelligence products have a cloud offering in Office 365. 6 – Advance options to speed up the backup (file striping, buffer count, max transfer size). However; re-running the job does not reproduce the error. 8 – Change data capture (CDC) an alternative to triggers. I will be covering these various TSQL techniques with examples using the [Adventure Works] database as well as a toy database called AUTOS. I will create a full text catalog / index, select a change tracking strategy, define optional stop list / thesaurus file, and then populate the index. 2 – Storing a version number just in-case the decode changes. You suggest that they restore the database from the last good backup. The following topics will be reviewed to make sure you have a successful data storage solution.This should give us a unique list of all the managers in Northwind company.We then, in the outer query, count the number records in the result returned from the sub-query.