The following is the statement that combines the INSERT and UPDATE statements into one.
MERGE
INSUPD
UPSERT
INUPDATE
To avoid duplication in the table, use -
IF NOT EXISTS INSERT
INSERT IGNORE INTO
INSERT IF NOT EXISTS
IGNORE IF EXISTS
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?
Derby
_impala_builtins
_hive_metastore
_impala_metastore
To print the create table statement for the existing table
DESCRIBE [database_name].table_name
PRINT CREATE TABLE [database_name].table_name
DISPLAY CREATE TABLE [database_name].table_name
SHOW CREATE TABLE [database_name].table_name
The command to refresh the metadata in Impala is-
reload metadata <tablename />
validate metadata <tablename />
refresh metadata <tablename />
Invalidate metadata <tablename />
LOAD DATA INPATH ‘/SampleData.txt’ INTO TABLE; This command is used to copy the file from
RDBMS
Local File System
Hcatalog
HDFS
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?
Struct
Array
BigInt
Map
Which option allows you to run a single query without having to start the interactive interpreter?
-q
run
-impalad
-i