Skip to main content

HTML Headings

There are 6 levels of document heading available in HTML, <h1>, <h2>, <h3> is the mostly used except <h6>.

HTML headings are defined with the <h1> to <h6> tags:

There are six header tags:
 h1
h2
h3
h4
h5
h6

Example: The following code shows all the heading levels, in use.


<h1>Greed never pays</h1>
<h2>Sometimes cunningness outwits itself</h2>
<h3>Sometimes, the solution is within the problem</h3>
<h4>Listen to all but do what you feel is right</h4>
<h5>Never trust an enemy's words</h5>
<h6>We often don’t realize the true value of the things we have </h6>


Here is the result of this code respectively: 


Greed never pays
Sometimes cunningness outwits itself
Sometimes, the solution is within the problem
Listen to all but do what you feel is right
Never trust an enemy's words
We often don't realize the true value of the things we have


Usage note:


  • Avoid skipping heading levels: always start from <h1>, next use <h2> and so on.
  • We should consider avoiding using <h1> more than once on a page
  • You should use one <h1> per section
  • The highest level is bigger and more prominent than the lower levels. It is not necessary to use <p> because all headers are rendered with a paragraph break before and after.

Popular posts from this blog

What is difference between UNION and UNION ALL in SQL Server

We use UNION and UNION ALL operator to combine multiple results set into one result set.
UNION operator is used to combining multiple results set into one result set but removes any duplicate rows. Basically, UNION is used to performing a DISTINCT operation across all columns in the result set. UNION operator has the extra overhead of removing duplicate rows and sorting result.
UNION ALL operator use to combine multiple results set into one result set but it does not remove any duplicate result. Actually, this does not remove duplicate rows so it is faster than the UNION operator. If you want to combine multiple results and without duplicate records then use UNION otherwise UNION ALL is better.
Following some rules for using UNION/UNION ALL operator
1.The number of the column should be the same in the query's when you want to combine them. 2.The column should be of the same data type. 3.ORDER BY clause can be applied to the overall result set not within each result set.
4.Column name of …

Dropdownlist selectedindexchanged event is not firing

<asp:DropDownList ID="ddlSource" runat="server" DataSourceID="SqlDataSource1" DataTextField="vcSuplierNm" ViewStateMode="Enabled DataValueField="vcSuplierCode" EnableViewState="true" AppendDataBoundItems="true" OnSelectedIndexChanged="ddl_OnSelectedIndexChanged" AutoPostBack="true"></asp:DropDownList>

Add property ViewStateMode="Enabled" and EnableViewState="true"
in drop DropDownList

Disable/Enable All the Foreign Key Constraint in SQL Server Database

In some scenario we need to disable all foreign key relationships from all table, suppose for bad testing purpose or you want to see what will be effect of garbage data on application or performance, due to this purpose you want to insert garbage data into table and this table contains foreign key constraints then you will get the error of foreign key constraint.
Many people face this types of issue, the following query will resolve this problem but be careful on the production server, it would be better if you do this under guidance to any DBA.
The following query will disable all constraints in the database.

execsp_msforeachtable'alter table ? nocheck constraint all'

Once you disabled all constraints you should also need to enable all constraints once you completed your work, so following query will help you to enable all constraints in the database.

execsp_msforeachtable'alter table ? with check check constraint all'

Using the above query you can resolve above described s…

Add day to ISODate in MongoDB

We can use $add operator to add days in ISODate in mongodb, $add is the Arithmetic Aggregation Operator which adds number and date in mongodb.
Syntax:

{ $add: [ <expression1>, <expression2>, ... ] }

Note:  If one of the argument is date $add operator treats to other arguments as milliseconds to add to the date.
Example: Suppose we have a Test collection as below.

{"Title" : "Add day to ISODate in MongoBD","CreatedDate" : ISODate("2016-07-07T08:00:00.000Z")}

Query to add 2 days in CreatedDate

db.Test.aggregate([      { $project: { Title: 1, AddedDate: { $add: [ "$CreatedDate", 2*24*60*60000 ] } } }    ])

Result:

{ "_id" : ObjectId("579a1567ac1b3f3732483de0"), "Title" : "Add day to ISODate in MongoBD", "AddedDate" : ISODate("2016-07-09T08:00:00.000Z") }

Note: As mentioned in above note we have to convert days in millisecond because $add operator treat to other arg…

Query to find foreign key relationship and name of the constraints for each table in the database

Sometimes we need to find all foreign key on a table so that we can analyze the relation of a table and can find the solution accordingly. It is very difficult to see it manually, by using the following query we can find all foreign key relationships on the particular table.

SELECT K_Table=FK.TABLE_NAME, FK_Column=CU.COLUMN_NAME, PK_Table=PK.TABLE_NAME, PK_Column=PT.COLUMN_NAME, Constraint_Name=C.CONSTRAINT_NAME FROMINFORMATION_SCHEMA.REFERENTIAL_CONSTRAINTSC INNERJOININFORMATION_SCHEMA.TABLE_CONSTRAINTSFKONC.CONSTRAINT_NAME=FK.CONSTRAINT_NAME INNERJOININFORMATION_SCHEMA.TABLE_CONSTRAINTSPKONC.UNIQUE_CONSTRAINT_NAME=PK.CONSTRAINT_NAME INNERJOININFORMATION_SCHEMA.KEY_COLUMN_USAGECUONC.CONSTRAINT_NAME=CU.CONSTRAINT_NAME INNERJOIN( SELECTi1.TABLE_NAME,i2.COLUMN_NAME FROMINFORMATION_SCHEMA.TABLE_CONSTRAINTSi1 INNERJOININFORMATION_SCHEMA

Remove special characters from string in SQL server

I faced many times an issue to remove special characters from a string. Suppose you are working on searching concept and you have to remove the special characters from search string due to query performance, there are many solution are available but T-SQL is easily resolved this issue.
Following query may help you to resolve your issue.

DECLARE@strVARCHAR(400) DECLARE@expresVARCHAR(50)='%[~,@,#,$,%,&,*,(,),.,!]%' SET@str='(remove) ~special~ *characters. from string in sql!' WHILEPATINDEX(@expres,@str)> 0 BEGIN SET@str=Replace(REPLACE(@str,SUBSTRING(@str,PATINDEX(@expres,@str), 1 ),''),'-',' ') END SELECT@str



How to change schema of table in SQL Server

In SQL Server 2005 and above versions  all tables grouped into schemas. When we creating a table without specify a schema SQL Server creates a default schema "dbo".  We can alter the schema of table. For example I am creating a table with default schema see bellow script.
CREATETABLE Codefari (             id INTIDENTITY(1,1),             title VARCHAR(400) ) SELECT name,SCHEMA_NAME(schema_id)as [Schema] FROMsys.tables WHERE  name ='Codefari'
Result set
name            Schema ------------------------------------------------ Codefari       dbo
(1 row(s) affected)
In result set we can see schema is dbo, if we want change schema of table then first we have to create a schema if does not exist. See below script.
CREATESCHEMA Blog GO ALTERSCHEMA Blog TRANSFER dbo.Codefari GO
SELECT name,SCHEMA_NAME(schema_id)as [Schema] FROMsys.tables WHERE  name ='Codefari'

$group (aggregation) in MongoDB

IF we want to group document by specific expression and want to output for each distinct grouping of document here we have to use $group. IF you familiar with Relational Database like SQL Server, It's work same like GROUP BY clause.
Output document contains the _id field which contains the distinct group by key also output document contains computed fields which grasp the value of some accumulator expression grouped by the _id.
Syntax:

{ $group: { _id: <expression>, <field1>: { <accumulator1> : <expression1> }, ... }

Accumulator Operator:
$num : It's returns sum of the numeric value. It can be use in $project also in mongodb 3.2 version.
$avg  : It's returns the average of numeric values. It can be use in $project also in mongodb 3.2 version.
$first : It's returns a value from the first document for each group.
$last : It's returns a value from the first document for each group.
$max : It's returns the highest expression value for each group.…