Suppose that I have a table named agents_timesheet that having a structure like this:
ID | name | health_check_record | date | clock_in | clock_out
---------------------------------------------------------------------------------------------------------
1 | AAA | {"mental":{"stress":"no", "depression":"no"}, | 6-Dec-2021 | 08:25:07 |
| | "physical":{"other_symptoms":"headache", "flu":"no"}} | | |
---------------------------------------------------------------------------------------------------------
2 | BBB | {"mental":{"stress":"no", "depression":"no"}, | 6-Dec-2021 | 08:26:12 |
| | "physical":{"other_symptoms":"no", "flu":"yes"}} | | |
---------------------------------------------------------------------------------------------------------
3 | CCC | {"mental":{"stress":"no", "depression":"severe"}, | 6-Dec-2021 | 08:27:12 |
| | "physical":{"other_symptoms":"cancer", "flu":"yes"}} | | |
Now I need to get all agents having flu at the day. As for getting the flu from a single JSON in Oracle SQL, I can already get it by this SQL statement:
SELECT * FROM JSON_TABLE(
'{"mental":{"stress":"no", "depression":"no"}, "physical":{"fever":"no", "flu":"yes"}}', '$'
COLUMNS (fever VARCHAR(2) PATH '$.physical.flu')
);
As for getting the values from the column health_check_record, I can get it by utilizing the SELECT statement.
But How to get the values of flu in the JSON in the health_check_record of that table?
Additional question
Based on the table, how can I retrieve full list of other_symptoms, then it will get me this kind of output:
ID | name | other_symptoms
-------------------------------
1 | AAA | headache
2 | BBB | no
3 | CCC | cancer
You can use JSON_EXISTS() function.
SELECT *
FROM agents_timesheet
WHERE JSON_EXISTS(health_check_record, '$.physical.flu == "yes"');
There is also "plain old way" without JSON parsing only treting column like a standard VARCHAR one. This way will not work in 100% of cases, but if you have the data in the same way like you described it might be sufficient.
SELECT *
FROM agents_timesheet
WHERE health_check_record LIKE '%"flu":"yes"%';
How to get the values of flu in the JSON in the health_check_record of that table?
From Oracle 12, to get the values you can use JSON_TABLE with a correlated CROSS JOIN to the table:
SELECT a.id,
a.name,
j.*,
a."DATE",
a.clock_in,
a.clock_out
FROM agents_timesheet a
CROSS JOIN JSON_TABLE(
a.health_check_record,
'$'
COLUMNS (
mental_stress VARCHAR2(3) PATH '$.mental.stress',
mental_depression VARCHAR2(3) PATH '$.mental.depression',
physical_fever VARCHAR2(3) PATH '$.physical.fever',
physical_flu VARCHAR2(3) PATH '$.physical.flu'
)
) j
WHERE physical_flu = 'yes';
db<>fiddle here
You can use "dot notation" to access data from a JSON column. Like this:
select "DATE", id, name
from agents_timesheet t
where t.health_check_record.physical.flu = 'yes'
;
DATE ID NAME
----------- --- ----
06-DEC-2021 2 BBB
Note that this approach requires that you use an alias for the table name (so you can use it in accessing the JSON data).
For testing I used the data posted by MT0 on dbfiddle. I am not a big fan of double-quoted column names; use something else for "DATE", such as dt or date_.
Related
I have an information table with a column of an array in string format. The length is unknown starting from 0. How can I put it in a where clause of PostgreSQL?
* hospital_information_table
| ID | main_name | alternative_name |
| --- | ---------- | ----------------- |
| 111 | 'abc' | 'abe, abx' |
| 222 | 'bbc' | '' |
| 333 | 'cbc' | 'cbe,cbd,cbf,cbg' |
* record
| ID | name | hospital_id |
| --- | ------- | ------------ |
| 1 | 'abc-1' | |
| 2 | 'bbe+2' | |
| 3 | 'cbf*3' | |
e.g. this column is for alternative names of hospitals. let's say e.g. 'abc,abd,abe,abf' as column Name and '111' as ID. And I have a record with a hospital name 'cbf*3' ('3' is the department name) and I would like to check its ID. How can I check all names one by one in 'cbe,cbd,cbf,cbg' and get its ID '333'?
--update--
In the example, in the record table, I used '-', '*', '+', meaning that I couldn't split the name in the record table under a certain pattern. But I can make sure that some of the alternative names may appear in the record name (as a substring). something similar to e.g. 'cbf' in 'cbf*3'. I would like to check all names, if 'abe' in 'cbf*3'? no, if 'abx' in 'cbf*3'? no, then the next row etc.
--update--
Thanks for the answers! They are great!
For more details, the original dataset is not in alphabetic languages. The text in the record name is not separable. it is really hard to find a separator or many separators. Therefore, for the solutions with regrex like '[-*+]' could not work here.
Thanks in advance!
You could use regexp_split_to_array to convert the coma-delimited string to a proper array, and then use the any operator to search inside it:
SELECT r.*, h.id
FROM record r
JOIN hospital_information h ON
SPLIT_PART(r.name, '-', 1) = ANY(REGEXP_SPLIT_TO_ARRAY(h.name, ','))
SQLFiddle demo
Substring can be used with a regular expression to get the hospital name from the record's name.
And String_to_array can transform a CSV string to an array.
SELECT
r.id as record_id
, r.name as record_name
, h.id as hospital_id
FROM record r
LEFT JOIN hospital_information h
ON SUBSTRING(r.name from '^(.*)[+*\-]\w+$') = ANY(STRING_TO_ARRAY(h.alternative_name,',')||h.main_name)
WHERE r.hospital_id IS NULL;
record_id
record_name
hospital_id
1
abc-1
111
2
bbe+2
222
3
cbf*3
333
Demo on db<>fiddle here
Btw, text [] can be used as a datatype in a table.
If I have a table with a single jsonb column and the table has data like this:
[{"body": {"project-id": "111"}},
{"body": {"my-org.project-id": "222"}},
{"body": {"other-org.project-id": "333"}}]
Basically it stores project-id differently for different rows.
Now I need a query where the data->'body'->'etc'., from different rows would coalesce into a single field 'project-id', how can I do that?
e.g.: if I do something like this:
select data->'body'->'project-id' projectid from mytable
it will return something like:
| projectid |
| 111 |
But I also want project-id's in other rows too, but I don't want additional columns in the results. i.e, I want this:
| projectid |
| 111 |
| 222 |
| 333 |
I understand that each of your rows contains a json object, with a nested object whose key varies over rows, and whose value you want to acquire.
Assuming the 'body' always has a single key, you could do:
select jsonb_extract_path_text(t.js -> 'body', x.k) projectid
from t
cross join lateral jsonb_object_keys(t.js -> 'body') as x(k)
The lateral join on jsonb_object_keys() extracts all keys in the object as rows. Then we use jsonb_extract_path_text() to get the corresponding value.
Demo on DB Fiddle:
with t as (
select '{"body": {"project-id": "111"}}'::jsonb js
union all select '{"body": {"my-org.project-id": "222"}}'::jsonb
union all select '{"body": {"other-org.project-id": "333"}}'::jsonb
)
select jsonb_extract_path_text(t.js -> 'body', x.k) projectid
from t
cross join lateral jsonb_object_keys(t.js -> 'body') as x(k)
| projectid |
| :--------- |
| 111 |
| 222 |
| 333 |
I am currently building a dynamic SQL query. The tables and columns are sent as parameters. So the columns may not be present in the table. Is there a way to pull NULL data in the result set when the column is not present in the table?
ex:
SELECT * FROM Table1
Output:
created date | Name | Salary | Married
-------------+-------+--------+----------
25-Jan-2016 | Chris | 2500 | Y
27-Jan-2016 | John | 4576 | N
30-Jan-2016 | June | 3401 | N
So when I run the query below
SELECT Created_date, Name, Age, Married
FROM Table1
I need to get
created date | Name | AGE | Married
-------------+-------+--------+----------
25-Jan-2016 | Chris | NULL | Y
27-Jan-2016 | John | NULL | N
30-Jan-2016 | June | NULL | N
Does anything like IF NOT EXISTS or ISNULL work in this?
I can't use extensive T-SQL in this segment and need to be simple since I am creating a UNION query to more than 50 tables (requirement :| ) . Any advice would be of great help to me.
I can't think of an easy solution. Since you're using dynamic sql, instead of
(previous dynamic string part)+' fieldname '+(next dynamic string part)
you could use
(previous dynamic string part)
+ case when exists (
select 1
from sys.tables t
inner join sys.columns c on t.object_id=c.object_id
where c.name=your_field_name and t.name=your_table_name)
) then ' fieldname ' else ' NULL ' end
+(next dynamic string part)
I am new to BigQuery and SQL. I have a table with following details
Schema
ID : String : Nullable
BCats : String : Repeated
ID can be repeated
Preview
ID BCats
|-----------------------|
| ABCD | BCat25 |
| | BCat24 |
| | BCat23 |
|_______________________|
| PQRS | BCat8 |
| | BCat9 |
|_______________________|
| ABCD | BCat23 |
| | BCat25 |
| | BCat24 |
|_______________________|
| MNOP | BCat12 |
| | BCat13 |
|_______________________|
| PQRS | BCat8 |
| | BCat9 |
|-----------------------|
I am trying to group the table based on ID using the following query
Query
SELECT BCats,ID
FROM (SELECT (GROUP_CONCAT(BCats)) as BCats,ID
FROM(
SELECT
UNIQUE(BCats) as BCats,ID FROM
my_table
GROUP BY
ID
)
GROUP BY
ID
)
OUTPUT from the query in JSON Format is
Output from Query
{"BCats":"BCat25,BCat24,BCat23","ID":"ABCD"}
{"BCats":"BCat8,BCat9","ID":"PQRS"}
{"BCats":"BCat12,BCat13","ID":"MNOP"}
My question is how can I output Array from the Query, like this
Expecting Output
{"BCats" : ["BCat25","BCat24","BCat23"],"ID":"ABCD"}
Currently I am getting BCats as a String.
I need to output this data into new table with BCats as Repeated.
Please Help.
Preview :
Try below. Note: in Web UI you need not only set Destination Table but also set/check-on Allow Large Results checkbox and uncheck Flatten Results checkbox
SELECT NEST(UNIQUE(BCats)) AS BCats, ID
FROM my_table
GROUP BY ID
You should instead use standard SQL. If you are familiar with legacy SQL, there is a migration guide that talks about the differences between the two dialects. After enabling standard SQL (uncheck "Use Legacy SQL" under "Show Options" in the UI) you can run e.g.:
WITH my_table AS (
SELECT 'ABCD' AS ID, ['BCat25', 'BCat24', 'BCat23'] AS BCats UNION ALL
SELECT 'PQRS', ['BCat8', 'BCat9'] UNION ALL
SELECT 'ABCD', ['BCat23', 'BCat25', 'BCat24'] UNION ALL
SELECT 'MNOP', ['BCat12', 'BCat13'] UNION ALL
SELECT 'PQRS', ['BCat8', 'BCat9']
)
SELECT
ID,
ARRAY_AGG(DISTINCT BCat) AS BCats
FROM my_table, UNNEST(BCats) AS BCat
GROUP BY ID;
I have a following table (simplified version) in SQLServer.
Table Events
-----------------------------------------------------------
| Room | User | Entered | Exited |
-----------------------------------------------------------
| A | Jim | 2014-10-10T09:00:00 | 2014-10-10T09:10:00 |
| B | Jim | 2014-10-10T09:11:00 | 2014-10-10T09:22:30 |
| A | Jill | 2014-10-10T09:00:00 | NULL |
| C | Jack | 2014-10-10T09:45:00 | 2014-10-10T10:00:00 |
| A | Jack | 2014-10-10T10:01:00 | NULL |
.
.
.
I need to create a query that returns person's whereabouts in given timestamps.
For an example: Where was (Jim at 2014-10-09T09:05:00), (Jim at 2014-10-10T09:01:00), (Jill at 2014-10-10T09:10:00), ...
The result set must contain the given User and Timestamp as well as the found room (if any).
------------------------------------------
| User | Timestamp | WasInRoom |
------------------------------------------
| Jim | 2014-10-09T09:05:00 | NULL |
| Jim | 2014-10-09T09:01:00 | A |
| Jim | 2014-10-10T09:10:00 | A |
The number of User-Timestamp tuples can be > 10 000.
The current implementation retrieves all records from Events table and does the search in Java code. I am hoping that I could push this logic to SQL. But how?
I am using MyBatis framework to create SQL queries so the tuples can be inlined to the query.
The basic query is:
select e.*
from events e
where e.user = 'Jim' and '2014-10-09T09:05:00' >= e.entered and ('2014-10-09T09:05:00' <= e.exited or e.exited is NULL) or
e.user = 'Jill' and '2014-10-10T09:10:00 >= e.entered and ('2014-10-10T09:10:00' <= e.exited or e.exited is NULL) or
. . .;
SQL Server can handle ridiculously large queries, so you can continue in this vein. However, if you have the name/time values in a table already (or it is the result of a query), then use a join:
select ut.*, t.*
from usertimes ut left join
events e
on e.user = ut.user and
ut.thetime >= et.entered and (ut.thetime <= exited or ut.exited is null);
Note the use of a left join here. It ensures that all the original rows are in the result set, even when there are no matches.
Answers from Jonas and Gordon got me on track, I think.
Here is query that seems to do the job:
CREATE TABLE #SEARCH_PARAMETERS(User VARCHAR(16), "Timestamp" DATETIME)
INSERT INTO #SEARCH_PARAMETERS(User, "Timestamp")
VALUES
('Jim', '2014-10-09T09:05:00'),
('Jim', '2014-10-10T09:01:00'),
('Jill', '2014-10-10T09:10:00')
SELECT #SEARCH_PARAMETERS.*, Events.Room FROM #SEARCH_PARAMETERS
LEFT JOIN Events
ON #SEARCH_PARAMETERS.User = Events.User AND
#SEARCH_PARAMETERS."Timestamp" > Events.Entered AND
(Events.Exited IS NULL OR Events.Exited > #SEARCH_PARAMETERS."Timestamp"
DROP TABLE #SEARCH_PARAMETERS
By declaring a table valued parameter type for the (user, timestamp) tuples, it should be simple to write a table valued user defined function which returns the desired result by joining the parameter table and the Events table. See http://msdn.microsoft.com/en-us/library/bb510489.aspx
Since you are using MyBatis it may be easier to just generate a table variable for the tuples inline in the query and join with that.