The following is the statement that combines the INSERT and UPDATE statements into one.
INSUPD
INUPDATE
MERGE
UPSERT
To avoid duplication in the table, use -
IF NOT EXISTS INSERT
IGNORE IF EXISTS
INSERT IF NOT 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?
_impala_metastore
Derby
_impala_builtins
_hive_metastore
To print the create table statement for the existing table
DESCRIBE [database_name].table_name
SHOW CREATE TABLE [database_name].table_name
PRINT CREATE TABLE [database_name].table_name
DISPLAY CREATE TABLE [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
Local File System
Hcatalog
RDBMS
Equal to, Not Equal to, Less than, Greater than - operators - are categorized as
Comparison Operators
Arithmetic Operators
Logical Operators
Equation Operators
Which of the following is not a complex data type?
BigInt
Map
Array
Struct
Which option allows you to run a single query without having to start the interactive interpreter?
-impalad
-i
run
-q