0
What else can I help you with?
How do you find duplicate record using SQL?
By default most implementaions of SQL WILL give you duplicate records unless you invoke the DISTINCT clause
How do you avoid duplicate data entry in aspnet with sql?
We can done with the help of Primary concept in Sql Server.
IS their any tool to generate E-R diagram by providing .sql file?
Oracle SQL Developer Data Modeler should generate and E-R diagram with an .sql file.
How you delete duplicate row of table in SQL?
This can be different depending on the SQL server involved. Please specify the Database being used (ie, mysql, postgresql, oracle, ms SQL Server) I am using SQL 2005 express, what is the command, i can only get... delete... and what else? lets say i want to delete a duplicate row that is row 2.
Why does SQL allow duplicate tuples?
There are many reasons why SQL allows duplicate tuples (rows):To store non-unique values.To simply remove primary keys, unique indexes, and unique constraints.It allows this if there is no unique constraint.
Can composite key has null values?
if you want composite key for using the sql use the following sql query: select distinct(col_name) from table_name where col_name is null;
Why you need primary key and foreign key?
In sql you use primary key more than one column in a table
What is the function of a Foreign Key in SQL?
A Foreign Key in SQL is used to establish a relationship between two tables. It ensures referential integrity by enforcing that values in a column (or columns) in one table must match the values in a primary key in another table. This helps maintain consistency and data integrity across linked tables.
What SQL keyword must be used to remove duplicate rows from the result?
The SQL SELECT DISTINCT StatementIn a table, some of the columns may contain duplicate values. This is not a problem, however, sometimes you will want to list only the different (distinct) values in a table. The DISTINCT keyword can be used to return only distinct (different) values.SQL SELECT DISTINCT SyntaxSELECT DISTINCT column_name(s) FROM table_name
When do you use union when pragramming?
UNION is a SQL set operation that returns all rows from two different select statements, and then eliminates any duplicate rows from the result
How primary keys in database are denoted?
In the actual SQL, by means of the primary key constraint.
How a primary key is fixed in a sql table?
A primary key field in a sql table is created using the PRIMARY KEY keyword. ex: CREATE TABLE tbl_employee ( emp_num VARCHAR(10), emp_name VARCHAR(100), PRIMARY KEY (emp_num)) The above script creates a table called tbl_employee and sets the emp_num field as the primary key
