<s>
Azure	B-General_Concept
Data	I-General_Concept
Explorer	I-General_Concept
is	O
a	O
fully-managed	O
big	B-Application
data	I-Application
analytics	I-Application
cloud	B-Architecture
platform	O
and	O
data-exploration	B-General_Concept
service	O
,	O
developed	O
by	O
Microsoft	O
,	O
that	O
ingests	O
structured	B-Application
,	O
semi-structured	B-Application
(	O
like	O
JSON	B-General_Concept
)	O
and	O
unstructured	B-Application
data	I-Application
(	O
like	O
free-text	B-Application
)	O
.	O
</s>
<s>
The	O
service	O
then	O
stores	O
this	O
data	O
and	O
answers	O
analytic	O
ad	O
hoc	O
queries	B-Language
on	O
it	O
with	O
seconds	O
of	O
latency	O
.	O
</s>
<s>
It	O
is	O
a	O
full	B-Application
text	I-Application
indexing	I-Application
and	O
retrieval	O
database	O
,	O
including	O
time	O
series	O
analysis	O
capabilities	O
and	O
regular	B-Language
expression	I-Language
evaluation	O
and	O
text	O
parsing	O
.	O
</s>
<s>
It	O
is	O
offered	O
as	O
Platform	B-Application
as	I-Application
a	I-Application
Service	I-Application
(	O
PaaS	B-Application
)	O
as	O
part	O
of	O
Microsoft	B-Application
Azure	I-Application
platform	O
.	O
</s>
<s>
In	O
2016	O
it	O
became	O
the	O
backend	O
big-data	B-Application
and	O
analytics	O
service	O
for	O
Application	O
Insights	O
Analytics	O
.	O
</s>
<s>
In	O
March	O
2021	O
,	O
"	O
Kusto	O
EngineV3	O
"	O
,	O
Azure	B-General_Concept
Data	I-General_Concept
Explorer	I-General_Concept
's	O
next	O
generation	O
storage	O
and	O
query	B-Language
engine	O
,	O
became	O
generally	O
available	O
.	O
</s>
<s>
Azure	B-General_Concept
Data	I-General_Concept
Explorer	I-General_Concept
offers	O
an	O
optimized	O
query	B-Language
language	I-Language
and	O
visualizing	O
options	O
of	O
its	O
data	O
with	O
a	O
SQL-like	O
language	O
called	O
KQL	O
(	O
Kusto	O
Query	B-Language
Language	I-Language
.	O
</s>
<s>
Azure	B-General_Concept
Data	I-General_Concept
Explorer	I-General_Concept
can	O
ingest	O
200	O
MB	O
per	O
second	O
per	O
node	O
.	O
</s>
<s>
Data	O
Ingestion	O
methods	O
are	O
pipelines	O
and	O
connectors	O
to	O
common	O
services	O
like	O
Azure	O
Event	O
Grid	O
or	O
Azure	O
Event	O
Hub	O
,	O
or	O
programmatic	O
ingestion	O
using	O
SDKs	B-Application
.	O
</s>
<s>
Data	O
visualization	O
can	O
be	O
achieved	O
using	O
their	O
,	O
or	O
with	O
tools	O
like	O
PowerBI	B-Application
or	O
Grafana	B-Protocol
.	O
</s>
<s>
Azure	B-General_Concept
Data	I-General_Concept
Explorer	I-General_Concept
is	O
a	O
distributed	B-Operating_System
database	I-Operating_System
running	O
on	O
a	O
cluster	B-General_Concept
of	O
compute	O
nodes	O
in	O
Microsoft	B-Application
Azure	I-Application
.	O
</s>
<s>
It	O
is	O
based	O
on	O
relational	B-Application
database	I-Application
management	I-Application
systems	I-Application
(	O
RDBMS	O
)	O
,	O
supporting	O
entities	O
such	O
as	O
databases	O
,	O
tables	B-Application
,	O
functions	O
,	O
and	O
columns	O
.	O
</s>
<s>
It	O
supports	O
complex	O
analytics	O
query	B-Language
operators	O
,	O
such	O
as	O
calculated	O
columns	O
,	O
searching	O
and	O
filtering	O
on	O
rows	O
,	O
group	O
by-aggregates	O
and	O
joins	B-Language
.	O
</s>
<s>
The	O
engine	O
service	O
exposes	O
a	O
relational	B-Architecture
data	I-Architecture
model	I-Architecture
:	O
At	O
the	O
top	O
level	O
(	O
cluster	B-General_Concept
)	O
there	O
is	O
a	O
collection	O
of	O
databases	O
,	O
each	O
database	O
contains	O
a	O
collection	O
of	O
tables	B-Application
and	O
stored	O
functions	O
.	O
</s>
<s>
Each	O
table	O
defines	O
a	O
schema	B-Application
(	O
ordered	O
list	O
of	O
typed	O
fields	O
)	O
.	O
</s>
<s>
In	O
Azure	B-General_Concept
Data	I-General_Concept
Explorer	I-General_Concept
,	O
unlike	O
a	O
typical	O
relational	B-Application
database	I-Application
management	I-Application
systems	I-Application
(	O
RDBMS	O
)	O
,	O
there	O
are	O
no	O
constraints	O
like	O
key	O
uniqueness	O
,	O
primary	B-Application
and	O
foreign	B-Application
key	I-Application
.	O
</s>
<s>
The	O
necessary	O
relationships	O
are	O
established	O
at	O
the	O
query	B-Language
time	O
.	O
</s>
<s>
The	O
data	O
in	O
Azure	B-General_Concept
Data	I-General_Concept
Explorer	I-General_Concept
generally	O
follows	O
this	O
pattern	O
:	O
Creating	O
Database	O
,	O
Ingesting	O
data	O
,	O
Query	B-Language
the	O
database	O
.	O
</s>
