You need to write the queries on your own. Our interactive SQL Basics course is brimming with basic SQL query examples! It contains over 100 interactive SQL exercises for you to solve on your own. Try it, and we’re sure you won’t regret it!
DROPqueries are used to delete a database or table. You should also be careful when using this type of query because it will remove everything, including table definition along with all the data, indexes, triggers, constraints and permission specifications for that table. DROP TABLE table_name...
Get yourself a FREE white paper with practical examples of Oracle queries. The basics of the SQL statements in Oracle This white paper will come in handy for Oracle developers who want to improve their skills in writing some basic queries. The document also delivers some tips and tricks, which...
Our main purpose should be to get results from the SQL queries as soon as possible with the least resource consumption and minimum execution time. As possible, we have to avoid using the asterisk (*) sign in theSELECTstatements. This usage type causes the consume more IO, CPU and Network ...
Understanding how SQL works can help you create better queries, and can make it easier for you to understand how to fix a query that is not returning the results that you want. This is one of a set of articles about Access SQL. This article describes the basic use of SQL t...
This PL SQL tutorial introduces PL/SQL with its features, basic syntax with examples. Learn to set up PL/SQL Environment step by step.
coded value, which is not stored in database, in the SELECT clause, is known s Literal. It can be number, character, or date value. Character and date values must be enclosed within quotes. Consider the below SQL queries.examples of using literals of different data types in SQL queries....
The following examples demonstrate the behavior of the RR datetime format element. RR Date Format Examples Assume these queries are issued between 1950 and 1999: SELECT TO_CHAR(TO_DATE('27-OCT-98', 'DD-MON-RR') ,'YYYY') "Year"FROM DUAL;Year---1998SELECT TO_CHAR(TO_DATE('27-OCT-17'...
The local instance of SQL Server doesn't process this query, but processes query results returned by the provider, a pass-through query. Pass-through queries are useful when used on providers that don't make available their tabular data through table names, but only through a command language...
The SQL Query Examples applications is a simple vehicle to demonstrate some of the more common and useful SQL queries for pulling information about subscribers and call handlers out of the UnityDB database on Unity 4.0(1) and later.The source code for the application isn’t very interesting bu...