SQL

For building faster SQL queries, follow these hints. 1. Use Smaller batches Always try to delete data or update data in smaller batches. If you try to delete thousands of

Sometimes it can be quite a tedious task to construct a simple SQL query. These queries usually includes a lot of repetition for similar, yet different results. If you take

For faster SQL queries, follow these hints. Know your data:When you know your data, or the structure of where your data is coming from, you will know how to formulate

The WITH TIES clause can only be used only with TOP and ORDER BY. Both TOP and ORDER BY are required. Now what does the WITH TIES clause actually do?

Learn more about how to use three very different SQL statements. ROW_NUMBER?Always generates unique values without any gaps. RANK? Has gaps in its sequence DENSE_RANK? Returns the same rank for

The process of hiding irrelevant details from a user is called data abstraction. The three levels of Data Abstraction in SQL are: Physical Level Logical Level View Level

You never know what can happen when you attempt to delete data. Some may argue that it is best to delete data through a client application, some may say it

Get a list of the names of all normalization forms in SQL. 1NF 2NF 3NF BCNF Boyce-Codd Normal Form 4NF 5NF ONF: Optimal Normal Form DKNF: Domain-Key Normal Form

What can cause poor performance of a query? Any or a combination of these: No indexes exist for the tables Unnecessarily complicated joins Excess usage of cursors Excess usage of