SQL Expressions
An expression is a combination of one or more values, operators, and SQL functions that evaluate to a value. SQL EXPRESSIONs are like formulas and they are written in query language. You can also use...
View ArticleSQL SELECT Database, USE Statement
When you have multiple databases in your SQL Schema, then before starting your operation, you would need to select a database where all the operations would be performed. The SQL USE statement is used...
View ArticleSQL Creating a Table from an Existing Table
A copy of an existing table can be created using a combination of the CREATE TABLE statement and the SELECT statement. The new table has the same column definitions. All columns or specific columns can...
View ArticleSQL CREATE Table
Creating a basic table involves naming the table and defining its columns and each column's data type. The SQL CREATE TABLE statement is used to create a new table. SQL Syntax: Basic syntax of CREATE...
View ArticleSQL DROP or DELETE Table
The SQL DROP TABLE statement is used to remove a table definition and all data, indexes, triggers, constraints, and permission specifications for that table. NOTE : You have to be careful while using...
View ArticleSQL INSERT Query
The SQL INSERT INTO Statement is used to add new rows of data to a table in the database. SQL Syntax: There are two basic syntaxes of INSERT INTO statement as follows: INSERT INTO TABLE_NAME (column1,...
View ArticleSQL SELECT Query
SQL SELECT Query statement is used to fetch the data from a database table which returns data in the form of result table. These result tables are called result-sets. SQL Syntax: The basic sql syntax...
View ArticleSQL WHERE Clause
The SQL WHERE clause is used to specify a condition while fetching the data from single table or joining with multiple tables. If the given condition is satisfied then only it returns specific value...
View ArticleSQL AND and OR operators
The SQL AND and OR operators are used to combine multiple conditions to narrow data in an SQL statement. These two operators are called conjunctive operators. These operators provide a means to make...
View ArticleSQL UPDATE Query
The SQL UPDATE Query is used to modify the existing records in a table. You can use WHERE clause with UPDATE query to update selected rows otherwise all the rows would be affected. SQL Syntax: The...
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