what is SQL INNER JOIN ?
what is SQL INNER JOIN ? The INNER JOIN keyword return rows when there is at least one match in both tables. EG:SELECT column_name(s) FROM table_name1 INNER JOIN table_name2 ON...
View Articlewhat is SQL ALTER TABLE ?
what is SQL ALTER TABLE ? The ALTER TABLE statement is used to add, delete, or modify columns in an existing table. eg:ALTER TABLE table_name ADD column_name datatype
View Articlewhat is CREATE TABLE?
what is CREATE TABLE? The CREATE TABLE statement is used to create a table in a database.
View ArticleWhat is CREATE DATABASE?
What is CREATE DATABASE? The CREATE DATABASE statement is used to create a database.
View Articlewhat is SQL LIKE Operator?
what is SQL LIKE Operator? The LIKE operator is used in a WHERE clause to search for a specified pattern in a column. eg:SELECT column_name(s) FROM table_name WHERE column_name LIKE pattern
View Articlewhat is SQL view?
what is SQL view? A view is a virtual table. eg: CREATE VIEW view_name AS SELECT column_name(s) FROM table_name WHERE condition
View Articlewhat are SQL Aggregate Functions?
what are SQL Aggregate Functions ? SQL aggregate functions return a single value, calculated from values in a column. eg: AVG() – Returns the average value COUNT() – Returns the number of rows FIRST()...
View ArticleExplain SQL scalar functions?
what are SQL scalar functions ? SQL scalar functions return a single value, based on the input value. Eg: UCASE() – Converts a field to upper case LCASE() – Converts a field to lower case MID() –...
View Articlewhat is SQL TOP Clause?
what is SQL TOP Clause? The TOP clause is used to specify the number of records to return. eg:SELECT TOP number|percent column_name(s) FROM table_name
View ArticleSQL UNION Operator
what is SQL UNION Operator? The SQL UNION operator combines two or more SELECT statements. Eg:SELECT column_name(s) FROM table_name1 UNION SELECT column_name(s) FROM table_name2
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