Oracle SQL Query to join multiple tables - sql

Question

I am trying to join multiple tables and the below query works well.
select
e.ENCNTR_ID e_id
, p.PERSON_ID p_id
, e.REG_DT_TM admitted
from
episode e
, patient p
where (e.reg_dt_tm > '01/JAN/2018'
and e.reg_dt_tm < '02/JAN/2018'
and e.active_ind = 1
and e.encntr_type_cd = 123.00
and e.ACTIVE_STATUS_CD = 1234
and e.person_id = p.person_id)
But when I change it and add more tables it gives me the error
"SQL Command not properly ended"
I need to add conditions on the first table(episode) as otherwise the query runs very slow.
select
e.ENCNTR_ID e_id
, p.PERSON_ID p_id
, e.REG_DT_TM admitted
, ce.EVENT_ID event_id
from
ENCOUNTER e
, person p
where (e.reg_dt_tm > '01/JAN/2018'
and e.reg_dt_tm < '02/JAN/2018'
and e.active_ind = 1
and e.encntr_type_cd = 7113.00
and e.ACTIVE_STATUS_CD = 22223
and e.person_id = p.person_id)
left join CLINICAL_EVENT ce on ce.ENCNTR_ID = e.ENCNTR_ID
and ce.EVENT_CD in (1235764
,22161234
)
and ce.valid_until_dt_tm > sysdate
left join CE_BLOB cb on ce.EVENT_ID = cb.EVENT_ID
and cb.valid_until_dt_tm > sysdate
order by e.REG_DT_TM, ce.PERFORMED_DT_TM, ce.CLINICAL_EVENT_ID

Answer 1

The query should look like this:
select e.ENCNTR_ID as e_id, p.PERSON_ID as p_id, e.REG_DT_TM as admitted, ce.EVENT_ID as event_id
from ENCOUNTER e join
person p
on e.person_id = p.person_id left join
CLINICAL_EVENT ce
on ce.ENCNTR_ID = e.ENCNTR_ID and
ce.EVENT_CD in (1235764, 22161234) and
ce.valid_until_dt_tm > sysdate left join
CE_BLOB cb
on ce.EVENT_ID = cb.EVENT_ID and
cb.valid_until_dt_tm > sysdate
where e.reg_dt_tm > date '2018-01-01' and
e.reg_dt_tm < date '2018-01-02' and
e.active_ind = 1 and
e.encntr_type_cd = 7113.00 and
e.ACTIVE_STATUS_CD = 22223
order by e.REG_DT_TM, ce.PERFORMED_DT_TM, ce.CLINICAL_EVENT_ID;
Notes:
Never use commas in the FROM clause. Always use proper, explicit, standard JOIN syntax.
The WHERE clause goes after the FROM clause.
JOIN is an operator in the FROM clause, so all JOINs need to be before the WHERE.
Use the keyword DATE for date constants.