Knowledge in sql
yash pal
DBMS INDEXING AND HASHING
Students of computer science, studying subject databases can refer to the notes below for reference and examination purpose. The attatchment includes topics of DBMS indexing and hashing such as Basic Concepts, Ordered Indices, B+-Tree Index Files, B-Tree Index Files, Static Hashing, Dynamic Hashing, Comparison of Ordered Indexing and Hashing, Index Definition in SQL, Multiple-Key Access, etc.
Learn Everyone
Some Query Language Commands
If you want to learn some kind of query language to manipulate data in your database then you can refer to these files as these contain some good information about a few types of SQL.
Vaibhav Jangid
Software Query Language
Software Query Language
Aaishika Rana
sql related topics
This gives a great detail about sql.. The table creation...all the domain type in sql.. Select, from,where clauses are also used.. String operations the duplicates and set operations. ..example queries are also explained. It also gives the joined relations..and derived relations. It also gives loan and borrow relation.
Rashika Sinha
Data Base Management System : basics , syntax of sql
A database management system (DBMS) is a software package designed to define, manipulate, retrieve and manage data in a database. A DBMS generally manipulates the data itself, the data format, field names, record structure and file structure.
Sucheta Kulkarni
database and sql notes
These are the notes of database and sql .These will help you clear the basic concepts of sql.
Kritika Rai
SQL Aliases
SQL Aliases SQL aliases are used to give a table, or a column in a table, a temporary name. Aliases are often used to make column names more readable. An alias only exists for the duration of the query. Alias Column Syntax SELECT column_name AS alias_name FROM table_name; Alias Table Syntax SELECT column_name(s) FROM table_name AS alias_name
yash sharma
SQL Comments
SQL Comments Comments are used to explain sections of SQL statements, or to prevent execution of SQL statements. Note: The examples in this chapter will not work in Firefox and Microsoft Edge! Comments are not supported in Microsoft Access databases. Firefox and Microsoft Edge are using Microsoft Access database in our examples. ________________________________________ Single Line Comments Single line comments start with --. Any text between -- and the end of the line will be ignored (will not be executed).
SQL FOREIGN KEY Constraint
SQL FOREIGN KEY Constraint A FOREIGN KEY is a key used to link two tables together. A FOREIGN KEY is a field (or collection of fields) in one table that refers to the PRIMARY KEY in another table. The table containing the foreign key is called the child table, and the table containing the candidate key is called the referenced or parent table.
SQL JOIN
SQL JOIN A JOIN clause is used to combine rows from two or more tables, based on a related column between them. Let's look at a selection from the "Orders" table: Then, look at a selection from the "Customers" table: Notice that the "CustomerID" column in the "Orders" table refers to the "CustomerID" in the "Customers" table. The relationship between the two tables above is the "CustomerID" column
SQL Keywords Reference
SQL Keywords Reference This SQL keywords reference contains the reserved words in SQL. ________________________________________