Extracting Entities
This tutorial explains how to extract things of importance (entities) from the project requirements, as a first step towards building database structure. Topics include: Extracting Entities
View ArticleData Modeling
This tutorial introduces the concept of data modeling. It is important that you understand how to create tables with appropriate structure before moving on to advance SQL topics. Topics include: Data...
View ArticleSorting Data in Descending Order
This tutorial explains how to sort data in descending order using Order By Clause. Topics include: Order By Clause with DESC keyword
View ArticleSorting Data
This tutorial explains how to sort data using ORDER BY clause. Topics include: Order By Clause
View ArticleNull Comparison Conditions
This tutorial explains the use of IS NULL and IS NOT NULL comparison operators. Topics include: IS NULL Operator IS NOT NULL Operator
View ArticleProblems with Null
This tutorial introduces problems that NULL creates. In the next tutorial you will learn how to deal with these problems. Topics include: Problems with Null
View ArticleConcept of Null / Inserting Null Value
This tutorial introduces you the concept of Null. You will learn how to insert Null values in a table. You will learn three versions of an INSERT statement. Topics include: Concept of Null Inserting...
View ArticleComparison Conditions
This tutorial explains Comparison Conditions. You will learn to use comparison operators on text strings. Also you will learn to compare on column with another in one condition. Topics include:...
View ArticleMatching Conditions
This tutorial explains Matching Conditions. You will learn the use of LIKE Operator and NOT LIKE Operator. Also you will learn the concept of Wildcards. Topics include: LIKE Operator NOT LIKE Operator...
View ArticleRange Conditions
This tutorial talks about Range Conditions. You will learn the use of BETWEEN Operator and NOT BETWEEN Operator and how they can be used instead of ORs and ANDs. Topics include: BETWEEN Operator NOT...
View ArticleMembership Conditions
This tutorial talks about Membership Conditions. You will learn the use of IN Operator and NOT IN Operator and how they can be used instead of ORs and ANDs. Topics include: IN Operator NOT IN Operator
View ArticleEquality/Inequality Conditions
This tutorial explains Equality and Inequality Conditions of WHERE clause. Topics include: Equality and Inequality Conditions
View ArticleUsing Brackets to Simply WHERE Clause
This tutorial explains the use of brackets while mixing and matching logical operators in the WHERE clause. Topics include: Using Brackets Mixing and Matching ANDs and ORs
View ArticleMultiple Logical Operators
This tutorial explains the use of multiple logical operators. You will learn how to create a WHERE clause with more than two conditions in it. Topics include: Multiple Logical Operators More than two...
View ArticleLogical Operators
This tutorial explains the use of logical operators. You will learn how to create a WHERE clause with two conditions in it. Topics include: Conditions and Expressions Logical Operators AND Operator OR...
View ArticleConditions, Expressions, Operators
This tutorial talks about conditions, expressions and operators. These are important components of a WHERE Clause. Topics include: Condition Expression Comparison Operator
View ArticleInstalling Oracle Express
This tutorial shows you how to install Oracle Express. Oracle Express is a free downloadable database from Oracle that you can use to practice your SQL. Topics include: What is Oracle Express Why...
View ArticleExpress Tour of SQL
This tutorial provides an express tour of SQL. You will learn how to create a table, how to view the structure of existing table, how to insert records, how to update records, how to retrieve data, how...
View ArticleIntroduction to SQL
This tutorial introduces SQL. You will learn what SQL is, what database is, why there was a need to create SQL. You will learn about database tables, about flat files and also about little bit history...
View Article