What is the difference between apex:dataTable and apex:pageBlockTable components in Visualforce?

Hi Saurabh,

     PageBlockTable:

• PageBlockTable should be define inside pageblock or pageblocksection.
• PageBlockTable uses standard styles sheets to design a visualpage.
• It has the  required attribute "value".
• Column headers  will be displayed automatically.

  DataTable:

• No need to write inside pageblock or pageblocksection.
• There is no required value.
• The  data can be displayed using  custom style sheets.
• we need to specify column headers explicitly.