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