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