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What is the difference between varchar and nvarchar?
The difference between varchar and nvarchardatatypes is that Nvarchar stores UNICODE data. If you have requirements to store UNICODE or multilingual data, nvarcharis your choice. Varchar stores ASCII data and should be your data type of choice for normal use.
What is the difference between char and varchar data types?
The CHAR datatype uses a fixed length, where as the VARCHAR datatype can be variable in length up to the maximum value specified for the length. If you insert "Hello" into a CHAR(10) field, the column would actually contain "Hello " with 5 trailing spaces. The same value inserted in a VARCHAR(10) field would contain "Hello". char datatype is fixed length data type and it store maximum 255 characters while varchardatatype store up to 4000 character of variable length datatype
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
How do you create a table in Microsoft SQL?
create table tb (id int primary key, name varchar(10) not null, age int) tb - name of the table
How do you create table in sql?
create table "table-name" -> exclude the quotes when creating the tableafter this a message will come : table created(row_name data type(limit of characters),... )for example(name varchar2(20)).This will make a column(attribute) in your table with the name "name" and data type varchar with character limit of 20.you can further add more attributes in the same manner.to insert values in the table you need this:insert into "table name" values(123,qwew,wsd,2342)the data in the brackets above depends on the attributes of your table.and now you have created a simple table.you can update, delete, alter, drop the table.
Difference between char and varchar datatypes?
Char is fixed length, while Varchar is variable length.
How do you create an application form using PHP?
CREATE TABLE `test`.`users` ( `id` INT NOT NULL auto_increment , `name` VARCHAR( 20 ) NOT NULL , `password` VARCHAR( 20 ) NOT NULL , `email` VARCHAR( 20 ) NOT NULL , PRIMARY KEY ( `id` ) )
What is the difference between text and varchar in mysql?
That is text where we put only character type value and that is varchar where we put all data type value
What is the difference between varchar and nvarchar?
The difference between varchar and nvarchardatatypes is that Nvarchar stores UNICODE data. If you have requirements to store UNICODE or multilingual data, nvarcharis your choice. Varchar stores ASCII data and should be your data type of choice for normal use.
What is the maximum size of varchar in db2?
32767 bytes
What is var char in php?
Varchar in SQL means string in PHP.
What does varchar content?
It is just a datatype used in databases for string values.
What is the difference between varchar and char?
Varchar cuts off trailing spaces if given a shorter word than its declared length, while char does not. Char will pad spaces after it if given a shorter word.
How do you create admin user in php?
Have a separate field in your database and allocate the post accordingly. For eg. $query = mysql_query("CREATE TABLE IF NOT EXISTS Login ( Username varchar(12) NOT NULL Primary Key, Password varchar(12) NOT NULL, Post varchar(8), // Add more fields to your liking )"); For post allocate as admin, supervisor, etc
What is the difference between varchar and int?
The former is for strings, the later is for numbers (integers).
How do you use case and else condition update and insert in sql server stored procedure?
CREATE PROCEDURE SP_MENUMASTER_UPDATE( @PARENT_ID INT(3) ,@MENU_NAME VARCHAR(100) ,@UR VARCHAR(100) ,@USR VARCHAR(255) ,@I_D INT(3) ,@ifvalue VARCHAR(50) ) AS BEGIN CASE ifvalue WHEN "newuser" THEN UPDATE MENUMASTER SET USER=USR WHERE ID=I_D; ELSE UPDATE MENUMASTER SET PARENTID=PARENT_ID,MENUNAME=MENU_NAME,URL=UR WHERE ID=I_D; END CASE; END
Maximum length of a varchar field in SQL Server?
12,500 is the maximum length of a varchar field. The nVarchar field has the same limitation however you will use twice the data store space with an nVarchar as it is effectively the same as a varchar with the exception that it will store data required for international character sets. If you support a multi-language system then you will want to use a nVarchar character type for these fields.
