The following is the statement that combines the INSERT and UPDATE statements into one.
MERGE
INUPDATE
UPSERT
INSUPD
To avoid duplication in the table, use -
INSERT IGNORE INTO
INSERT IF NOT EXISTS
IGNORE IF EXISTS
IF NOT EXISTS INSERT
Does ‘Anti Join’ perform better than left join?
Can't Say
Yes
No
Which of the following databases should be used to display built-in functions?
_impala_metastore
_impala_builtins
Derby
_hive_metastore
To print the create table statement for the existing table
SHOW CREATE TABLE [database_name].table_name
DISPLAY CREATE TABLE [database_name].table_name
PRINT CREATE TABLE [database_name].table_name
DESCRIBE [database_name].table_name
The command to refresh the metadata in Impala is-
refresh metadata <tablename />
Invalidate metadata <tablename />
reload metadata <tablename />
validate metadata <tablename />
LOAD DATA INPATH ‘/SampleData.txt’ INTO TABLE; This command is used to copy the file from
HDFS
RDBMS
Local File System
Hcatalog
Equal to, Not Equal to, Less than, Greater than - operators - are categorized as
Equation Operators
Arithmetic Operators
Comparison Operators
Logical Operators
Which of the following is not a complex data type?
BigInt
Struct
Map
Array
Which option allows you to run a single query without having to start the interactive interpreter?
-impalad
run
-q
-i