this is the rhbase ppt

1. RHBASE

2. • Create hbase table:
hb.new.table(TABLE_NAME, COLUMN_FAMILY)
*This function is used to create the table and
column in the table

3. Hb.put
• The design of hb.put is meant to be simple
and flexible. For a given table and column
family, hb.put allows the creation of a list of
“columns” and a list of “values” for each “row-
key.” This option is designed for inputting
multiple columns into the same row-key

4. • Example:
hb.put(table_name = TABLE_NAME,
column_family = COLUMN_FAMILY, rowkey =
dt_names$rowkey, column =
dt_names$variable, value = baggage_trucks)

5. Hb.pull
• This function is used to retrieve the data that
has been stored in the table.
Example:
hb.pull(TABLE_NAME, COLUMN_FAMILY, start =
"LAX::20140306", end = "LAXa", columns =
"speed", batchsize = 100)

6. Listing a Table
• Syntax:
hbase(main):001:0 > list
*list is the command that is used to list all the
tables in HBase. Given below is the syntax of
the list command.
• Example
hbase(main):001:0> list TABLE emp

7. Disabling a Table
• To delete a table or change its settings, you
need to first disable the table using the
disable command. You can re-enable it using
the enable command.
• Syntax:
disable ‘emp’

8. Enabling a Table
• Syntax to enable a table:
enable ‘emp’
• is_enabled:
This command is used to find whether a table is
enabled. Its syntax is as follows:
*hbase> is_enabled 'table name'

9. hb.init():
• The method init() is used to initiate the
process of hadoop database.