Share on Google+Share on Google+

Krishnan R
Difference between not null and primary key in mysql
0 Answer(s)      4 years and 11 months ago
Posted in : SQL

Explain not null and primary key in mysql

Ads

View Answers









Related Tutorials/Questions & Answers:
Difference between not null and primary key in mysql
Difference between not null and primary key in mysql  Explain not null and primary key in mysql
difference between a primary key and a unique key?
difference between a primary key and a unique key?  What's the difference between a primary key and a unique key?   Hi, The column holding the primary key constraint cannot accept null values.whereas column holding
Advertisements
Mysql add primary key
Mysql add primary key       Mysql add Primary Key is used to add primary key on the column... of this tutorial illustrate an example from 'Mysql Add Primary Key'. To understand
Mysql Alter Table Primary Key
Mysql Alter Table Primary Key       Mysql Alter Table Primary Key is used to remove the primary key from the table and add primary key to the existing other column of table
primary key and unique key
primary key and unique key  hello, What's the difference between a primary key and a unique key?   hii, Unique key: column restricts entry of duplicate values but entry of null values is allowed. Primary key
Mysql Alter Column Primary Key
Mysql Alter Column Primary Key       Mysql Alter Column Primary Key is used to modify table... The Tutorial illustrate an example from 'Mysql Alter Column Primary Key
Difference between Mysql and SQL
Difference between Mysql and SQL  hello, What is the difference between Mysql and SQL??   hii, SQL is structural quary language but mysql is database package
How to auto increment primary key in mysql...
How to auto increment primary key in mysql...  How to auto increment primary key in mysql... and one more thing i need to get auto increment value in front end each time for inserting the value[JSP
what is the difference between productList==null and productList.size()==0
what is the difference between productList==null and productList.size()==0  what is the difference between productList==null and productList.size()==0? here productList is of type LIST
inserting into mysql database with uid to be primary key and autoincrement
inserting into mysql database with uid to be primary key and autoincrement .... In the database table, set the uid as the primary key and auto-increment. Then, whenever...:mysql://localhost:3306/roseindia", "root", "root"); Statement st
mysql difference between two numbers
mysql difference between two numbers  How to get total bate difference between two dates for example 1/01/2012 and 1/02/2012 in MYSQL?   ..., '01/02/2012', 103))   DATEDIFF() in MYSQL always returns the difference
primary key and unique key
primary key and unique key  Whats is mean by primary key and unique key
What is the difference between mysql_fetch_object and mysql_fetch_array?
What is the difference between mysql_fetch_object and mysql_fetch_array?  What is the difference between mysqlfetchobject and mysqlfetcharray
What is a "primary key"?
What is a "primary key"?  What is a "primary key"?   Hi, Here is the answer, A primary key is used to uniquely identify each row... be an artificial field (one that has nothing to do with the actual record). A primary key can
composinte primary key in hibernate
composinte primary key in hibernate  I am facing following problem, Inside the database(mssql), i have created a table without primary key... primary key with all the columns of the table and hibernate s/w has created two pojo
Adding A Primary Key to an Existing Table
Adding A Primary Key to an Existing Table   Been trying to add a primary key to a MySQL table using Java for two days with no success. I'm new... KEY (SerialNo)"); out.println("Primary key added
SQL Alter Table Primary Key
SQL Alter Table Primary Key       Alter a Table Primary Key in SQL modifies the existing table and adds a primary key. Create Table Stu_Table SQL statement to create
changing primary key of parent table
changing primary key of parent table  I want to change one primary key from a table where primary key is auto created? How can I do that? I have... to your MySQL server version for the right syntax to use near 'upate person set
SQL PRIMARY KEY Constraint
values. It should contain NULL values. The Table contain a primary key... integer(2) NOT NULL, Stu_Name varchar(15), Stu_Class varchar(10), PRIMARY KEY(Stu... SQL PRIMARY KEY Constraint     
SQL Primary Key
in a database table. The Primary Key of the Table does not include NULL values...' with the primary key 'user_id'. The field name 'user_id' does not include a null value. ... users(user_id int not null primary key,last_name varchar(25) not null,first_name
JDBC insert that returns primary key
JDBC insert that returns primary key  How to write code for jdbc insert that returns primary key? Help me fast Thanks   Hi, Following... = pstmtInsert.getGeneratedKeys(); if(rsInsert != null && rsInsert.next
Create primary key using hibernate
Create primary key using hibernate  How to create primary key using hibernate?   The id element describes the primary key for the persistent class and how the key value is generated.   <id name="id
how tohow to create a table with primary key and foreign keyhow to create a table with primary key and foreign key
how tohow to create a table with primary key and foreign keyhow to create a table with primary key and foreign key  how to create a table using java language with primary key and foreign key   Hi Friend, A foreign
SQL PRIMARY KEY Constraint
a unique values. It should contain NULL values. The Table contain a primary key... integer(2) NOT NULL, Stu_Name varchar(15), Stu_Class varchar(10), PRIMARY KEY... SQL PRIMARY KEY Constraint     
Mysql Difference
Mysql Difference       Mysql Difference is used to return the records that are the outcome of difference between the records in a table. Understand with Example The Tutorial
Mysql Difference
Mysql Difference       Mysql Difference is used to return the records that are the outcome of difference between the records in a table. Understand with Example
hibernate annotations with composite primary key
to use hibernate annotations in case of composite primary key in one table. I tried like this, I have created a table without primary key. By default mssql has created a composite primary key with all the columns of the table. table
What is the difference between MongoDB and MySql?
The difference between MongoDB and MySql is that the in former one whole... than MySql will work perfectly but if a data is complex and you want to store serialized arrays or JSON objects then MongoDB is advised. MySql has JOIN
How to create primary key using hibernate?
How to create primary key using hibernate?  Hi, How to create primary key using hibernate? Thanks
query regarding auto increment primary key
query regarding auto increment primary key  i want to use s1,s2.... as my auto increment primary key.cant i do this in mysql
SQL Alter Table Primary Key tutorial
SQL Alter Table Primary Key       Alter a Table Primary Key in SQL modifies the existing table and adds a primary key. Create Table Stu_Table SQL statement to create
Tutorials   
Java Spring Hibernate Struts Training How to Fetch Data using dropdown option How to get day from date in SQL? Example of sorting results in MySQL Distinct and Limit example in MySQL How to download install and use MySQL workbench? Example of Average, Sum, Min and Max functions in MySQL How to delete data from MySQL? Update SQL Query Example Order by example in MySQL AND and OR Operators in MySQL Query Where clause with query in MySQL How to use select Statement in MySQL? How to insert data into MySQL Table? Create Database and tables in MySQL example of before insert trigger in mysql Failed to Call Procedure MY Sql Query Error - Not able to Understand the issue which query will be run for previous(button) question How to access data yearly from DB in C# ? Fastest way to upload huge raw data in database - c#, Java or stored procedure DB Insert Nb hours between 2 time stamps meets specific criteria mysql select into table from another table example MySQLselect into new table Example code How to create a .mdf file from script (.sql) Please help me out fixing broken relational links in MySQL database after an upgrade How do I upgrade mysql? mysql 4.x to 5.x upgrade problem Upgrading a PHP/MYSQL application? upgrading sql query join phpmyadmin in whm whm php version update php cpanel cpanel mysql downgrade cpanel mysql version upgrade mysql whm upgrade mysql 4 5 cpanel upgrade mysql cpanel server Did my upgrade from mySQL 5.1 to 5.5 work Upgrade to MySQL 5.5 ? - cPanel Mem use upgrade from MySQL 5.1 to 5.5 - cPanel Upgrading MySQL from 5.0 to 5.1 or 5.5 - cPanel Mysql Upgrade on WHM (Mysql 5.1 to 5.5)cPanel Mysql Upgrade on WHM (Mysql 5.1 to 5.5) - cPanel Updating from MySQL 5.0 to 5.5 cPanel MySQL 5.1 upgrade to 5.5 error Charset problem upon publishing PHP + MySQL website MySQL issue: Table 'data_dictionary.CHARACTER_SETS' doesn't exist SQL Error Version 5.5.15

Ads

 
Advertisement null

Ads