I have one table like this (report)
--------------------------------------------------
| user_id | Department | Position | Record_id |
--------------------------------------------------
| 1 | Science | Professor | 1001 |
| 1 | Maths | | 1002 |
| 1 | History | Teacher | 1003 |
| 2 | Science | Professor | 1004 |
| 2 | Chemistry | Assistant | 1005 |
--------------------------------------------------
I'd like to have the following result
---------------------------------------------------------
| user_id | Department+Position |
---------------------------------------------------------
| 1 | Science,Professor;Maths, ; History,Teacher |
| 2 | Science, Professor; Chemistry, Assistant |
---------------------------------------------------------
That means I need to preserve the empty space as ' ' as you can see in the result table.
Now I know how to use LISTAGG function but only for one column. However, I can't exactly figure out how can I do for two columns at the sametime. Here is my query:
SELECT user_id, LISTAGG(department, ';') WITHIN GROUP (ORDER BY record_id)
FROM report
Thanks in advance :-)
It just requires judicious use of concatenation within the aggregation:
select user_id
, listagg(department || ',' || coalesce(position, ' '), '; ')
within group ( order by record_id )
from report
group by user_id
i.e. aggregate the concatentation of department with a comma and position and replace position with a space if it is NULL.
Related
Oracle SQL
I would like to look-up data from 2 rows of the same column from the same table together in an existing long query with multiple joins.
Current table set-up (single table):
Table: ACCOUNT_DETAILS
| TRX_ID | TYPE | FAC_ID | ACC_ID |
| ------ | ---- | ------ | ------ |
| 1234 | CRDR | ABC123 | AB1234 |
| 1234 | DBTR | XYZ222 | XY9800 |
| 9876 | CRDR | EFG999 | EF7659 |
| 9876 | DBTR | ABC123 | AB9900 |
Expected Result:
Table: REPORT
| TRX_ID | Counterparty FAC_ID | Counterparty ACC_ID |
| ------ | ------------------- | ------------------- |
| 1234 | XYZ222 | XY9800 |
| 9876 | EFG999 | EF7659 |
Logic needed:
If FAC_ID NOT LIKE 'ABC%' then refer to the Counterparty FAC_ID (e.g. for TRX_ID = 1234, it will refer to the DBTR FAC_ID and DBTR ACC_ID; TRX_ID = 9876, it will refer to the CRDR FAC_ID AND CRDR ACC_ID)
Example:
SELECT (CASE WHEN TYPE = 'DBTR' AND FAC_ID LIKE 'ABC%' THEN (SELECT FAC_ID FROM ACCOUNT_DETAILS WHERE TYPE = 'CRDR')
ELSE (SELECT FAC_ID FROM ACCOUNT_DETAILS WHERE TYPE = 'DBTR') END)
FROM ACCOUNT_DETAILS
I've tried options such as JOINs, UNIONs and subqueries but it does not work. I would like to have the Counterparty FAC_ID and Counterparty ACC_IDs in separate single lines in the query, as I will include it in a long query that I already have.
We can use CASE in a CTE to flag the rows where FAC_ID does not start with "ABC" and then use the flag in the WHERE clause.
See db<>fiddle here for schema.
with cte as
(
select
TRX_ID,
FAC_ID,
ACC_ID,
CASE WHEN FAC_ID LIKE 'ABC%' THEN 0 ELSE 1 END ordinal
FROM ACCOUNT_DETAILS)
SELECT
TRX_ID,
FAC_ID,
ACC_ID
FROM CTE
WHERE ordinal = 1;
TRX_ID | FAC_ID | ACC_ID
-----: | :----- | :-----
1234 | XYZ222 | XY9800
9876 | EFG999 | EF7659
db<>fiddle here
I'm trying to get some precise row counts for all tables, given that some have deleted rows. I have been using sys.storage.count. But this seems to count the deleted ones also.
I assume using sys.storage would be simpler and faster than looping through count(*) queries, though both strategies may be fine in practice.
Maybe there is some column that counts modifications so I could just subtract the two counts?
If all you need to know is the number of actual rows in a table, I'd recommend just using a count(*) query. It's very fast. Even if you have N tables, it's easy to do a count(*) for each table.
sys.storage gives you information from the raw storage. With that, you can get pretty low-level information, but it has some edges. sys.storage.count returns the count in the storage, hence, indeed, it includes the delete rows since they are not actually deleted. As of Jul2021 version of MonetDB, deleted rows are automatically overwritten by new inserts (i.e. auto-vacuuming). So, to get the actual row count, you need to look up the 'deletes' from sys.deltas('<schema>', '<table>'). For instance:
sql>create table tbl (id int, city string);
operation successful
sql>insert into tbl values (1, 'London'), (2, 'Paris'), (3, 'Barcelona');
3 affected rows
sql>select * from tbl;
+------+-----------+
| id | city |
+======+===========+
| 1 | London |
| 2 | Paris |
| 3 | Barcelona |
+------+-----------+
3 tuples
sql>select schema, table, column, count from sys.storage where table='tbl';
+--------+-------+--------+-------+
| schema | table | column | count |
+========+=======+========+=======+
| sys | tbl | city | 3 |
| sys | tbl | id | 3 |
+--------+-------+--------+-------+
2 tuples
sql>select id, deletes from sys.deltas ('sys', 'tbl');
+-------+---------+
| id | deletes |
+=======+=========+
| 15569 | 0 |
| 15570 | 0 |
+-------+---------+
2 tuples
After we delete one row, the actual row count is sys.storage.count - sys.deltas ('sys', 'tbl').deletes:
sql>delete from tbl where id = 2;
1 affected row
sql>select * from tbl;
+------+-----------+
| id | city |
+======+===========+
| 1 | London |
| 3 | Barcelona |
+------+-----------+
2 tuples
sql>select schema, table, column, count from sys.storage where table='tbl';
+--------+-------+--------+-------+
| schema | table | column | count |
+========+=======+========+=======+
| sys | tbl | city | 3 |
| sys | tbl | id | 3 |
+--------+-------+--------+-------+
2 tuples
sql>select id, deletes from sys.deltas ('sys', 'tbl');
+-------+---------+
| id | deletes |
+=======+=========+
| 15569 | 1 |
| 15570 | 1 |
+-------+---------+
2 tuples
After we insert a new row, the deleted row is overwritten:
sql>insert into tbl values (4, 'Praag');
1 affected row
sql>select * from tbl;
+------+-----------+
| id | city |
+======+===========+
| 1 | London |
| 4 | Praag |
| 3 | Barcelona |
+------+-----------+
3 tuples
sql>select schema, table, column, count from sys.storage where table='tbl';
+--------+-------+--------+-------+
| schema | table | column | count |
+========+=======+========+=======+
| sys | tbl | city | 3 |
| sys | tbl | id | 3 |
+--------+-------+--------+-------+
2 tuples
sql>select id, deletes from sys.deltas ('sys', 'tbl');
+-------+---------+
| id | deletes |
+=======+=========+
| 15569 | 0 |
| 15570 | 0 |
+-------+---------+
2 tuples
So, the formula to compute the actual row count (sys.storage.count - sys.deltas ('sys', 'tbl').deletes) is generally applicable. sys.deltas() keeps stats for every column of a table, but the count and deletes are table wide, so you only need to check one column.
I have this written and working as a raw SQL query, but I am trying to convert it to a more Laravel eloquent / query builder design instead of just a raw query.
My table structure like this:
Table One (Name model)
______________
| id | name |
|------------|
| 1 | bob |
| 2 | jane |
--------------
Table Two (Date Model)
_________________________________
| id | table_1_id | date |
|-------------------------------|
| 1 | 1 | 2000-01-01 |
| 2 | 1 | 2000-01-31 |
| 4 | 1 | 2000-02-28 |
| 5 | 1 | 2000-03-03 |
| 6 | 2 | 2000-01-03 |
| 7 | 2 | 2000-01-05 |
---------------------------------
I am returning only the the highest (most recent) dates from table 2 (Dates model) that match the user bob from table 1 (Name model).
For instance, in the example above, I return this from my query
2000-01-31
2000-02-28
2000-03-03
Here is what I am doing now (which works), but i'm just not sure how to use YEAR, MONTH and MAX with laravel.
DB::select(
DB::raw("
SELECT MAX(date) as max_date
FROM table_2
INNER JOIN table_1 ON table_1.id = table_2.table_1_id
WHERE table_1.name = 'bob'
GROUP BY YEAR(date), MONTH(date)
ORDER BY max_date DESC
")
);
Try this code if any problem then,
DB::table('table_1')->join('table_2', 'table_1.id','=','table_2.table_1_id')
->select(DB::raw('MAX(date) as max_date'),DB::raw('YEAR(date) year, MONTH(date) month'),'table_1.name')
->where('name','bob')
->groupBy('year','month')
->orderBy('max_date')
->get();
If any problem with above code then feel free to ask.
I am working on Oracle 11G.
One of my Materialized view has become UNKNOWN (MY_MAT_VW1). You can check the output of the ALL_MVIEWS below.
OWNER | MVIEW_NAME | CONTAINER_NAME | QUERY | QUERY_LEN | UPDATABLE | UPDATE_LOG | MASTER_ROLLBACK_SEG | MASTER_LINK | REWRITE_ENABLED | REWRITE_CAPABILITY | REFRESH_MODE | REFRESH_METHOD | BUILD_MODE | FAST_REFRESHABLE | LAST_REFRESH_TYPE | LAST_REFRESH_DATE | STALENESS | AFTER_FAST_REFRESH | UNKNOWN_PREBUILT | UNKNOWN_PLSQL_FUNC | UNKNOWN_EXTERNAL_TABLE | UNKNOWN_CONSIDER_FRESH | UNKNOWN_IMPORT | UNKNOWN_TRUSTED_FD | COMPILE_STATE | USE_NO_INDEX | STALE_SINCE | NUM_PCT_TABLES | NUM_FRESH_PCT_REGIONS | NUM_STALE_PCT_REGIONS
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
MY_DB | MY_MAT_VW1 | MY_MAT_VW1 | select.. | 6728 | N | | | | N | GENERAL | DEMAND | COMPLETE | IMMEDIATE | NO | COMPLETE | 14-Nov-16 | UNKNOWN | NA | N | Y | N | N | N | N | VALID | N | 0 | | |
MY_DB | MY_MAT_VW2 | MY_MAT_VW2 | select.. | 7074 | N | | | | N | TEXTMATCH | DEMAND | COMPLETE | IMMEDIATE | NO | COMPLETE | 13-Nov-16 | FRESH | NA | N | N | N | N | N | N | FRESH | N | 0 | 0 | |
The queries for the materialized view contain complex joins between multiple tables, inline views and unions.
As per my understanding (UNKNOWN_PLSQL_FUNC column) I guess there is a PLSQL Function which is causing the staleness to become UNKNOWN. However I am not sure which one.
I tried re-compiling and refreshing it but no luck.
Can anyone provide me some information on how to detect the root cause and make sure it does not become UNKNOWN again.
Also is there any implication of it on the data stored within it?
Below is just a sample I've created to replicate the scenario.
SELECT * FROM ENTITY_T;
ID | ENTITY_TYPE | FIRST_NAME | LAST_NAME | LEGAL_NAME
--------------------------------------------------
1 | INDIVIDUAL | JOHN | LESSEN |
2 | INDIVIDUAL | ROSAN | MEL |
3 | CORP | SIGMA | | SIGMA CORPORATION
--Function to get name base upon type
CREATE OR REPLACE FUNCTION GET_NAME (P_ID IN NUMBER)
RETURN VARCHAR2
DETERMINISTIC
AS
LV_NAME VARCHAR2(200);
BEGIN
SELECT CASE ENTITY_TYPE WHEN 'INDIVIDUAL' THEN FIRST_NAME ||' '|| LAST_NAME
WHEN 'CORP' THEN LEGAL_NAME
ELSE 'NONE'
END INTO LV_NAME
FROM ENTITY_T
WHERE ID=P_ID;
RETURN LV_NAME;
EXCEPTION
WHEN NO_DATA_FOUND THEN
RETURN 'NO ID FOUND';
WHEN OTHERS THEN
RETURN 'OTHER ERROR';
END;
--Materialized view creation
CREATE MATERIALIZED VIEW TEST_MV
AS
SELECT ID,ENTITY_TYPE,GET_NAME(ID) NAME
FROM ENTITY_T;
SELECT MVIEW_NAME,STALENESS,AFTER_FAST_REFRESH,UNKNOWN_PLSQL_FUNC,COMPILE_STATE,STALE_SINCE
FROM ALL_MVIEWS WHERE MVIEW_NAME='TEST_MV';
MVIEW_NAME | STALENESS | AFTER_FAST_REFRESH | UNKNOWN_PLSQL_FUNC | COMPILE_STATE | STALE_SINCE
----------------------------------------------------------------------------------------------
TEST_MV | UNKNOWN | NA | Y | VALID |
The Oracle Issue/Doc ID 757537.1 mentioned by JSapkota states clearly, that this is not a bug, but correct/expected behaviour:
STALENESS of the mview, refering to PL/SQL function is set to UNKOWN
as one cannot determine PL/SQL function changes. Current behaviour is
correct as per the design & code.
I guess using DETERMINISTIC functions instead of the default scope could prevent it.
As per the My Oracle Support this could be a bug(7582462).
As there is no solution to this bug, you have to deal with fact that staleness will show unknown, or not use functions on Materialized View definition.
Reference:DBA_MVIEWS Shows STALENESS Value of UNKNOWN After Refresh (Doc ID 757537.1)
I have a SQL Server table like this
+----+-----------+------------+
| id | acoount | date |
+----+-----------+------------+
| | John | 2/6/2016 |
| | John | 2/6/2016 |
| | John | 4/6/2016 |
| | John | 4/6/2016 |
| | Andi | 5/6/2016 |
| | Steve | 4/6/2016 |
+----+-----------+------------+
i want insert the id coloumn like this.
+-----------+-----------+------------+
| id | acoount | date |
+-----------+-----------+------------+
| 020616001 | John | 2/6/2016 |
| 020616002 | John | 2/6/2016 |
| 040616001 | John | 4/6/2016 |
| 040616002 | John | 4/6/2016 |
| 050616001 | Andi | 5/6/2016 |
| 040616003 | Steve | 4/6/2016 |
+-----------+-----------+------------+
I want to generate id number of the date provided like this. 02+06+16(from date)+001 = 020616001. if have same date, id + 1.
I have tried but still failed .
I want make it in oracle sql develop.
Someone help me.
Thanks.
Try the below SQL as per the given data, Its in SQL Server 2012....
select REPLACE(CONVERT(VARCHAR(10),convert(date,t.[date]), 101), '/', '')
+'00'+convert(varchar(2),row_number()over(partition by account,[date] order by t.[date])) as ID,
t.account,
t.date
from (values ('John','2/6/2016'),
('John','2/6/2016'),
('John','4/6/2016'),
('John','4/6/2016'),
('Andi','5/6/2016'),
('Steve','4/6/2016'))T(account,[date])
Update your table using statement .
update table set id= replace(CONVERT(VARCHAR(10),CONVERT(datetime ,date,103),3) ,'/', '') + Right('00'+convert(varchar(2),row_number()over(partition by account,[date] order by t.[date])) ,3)
MySql
i can give you the logic of 020616001 this part right now .......
for same id +1 i have to work on it....that i ll let u know after my work
insert into table_name(id)
select concat
(
if(length (day(current_date))>1,day(current_date),Concat(0,day(current_date))),
if(length (month(current_date))>1,month(current_date),Concat(0,month(current_date))),
(right(year(current_date),2)),'001'
)as id
you cannot convert your dates column to datetime type in normal way because it is dd/mm/yyyy.
Try this,
declare #t table(acoount varchar(50),dates varchar(20))
insert into #t values
('John','2/6/2016')
,('John','2/6/2016')
,('John','4/6/2016')
,('John','4/6/2016')
,('Andi','5/6/2016')
,('Steve','4/6/2016')
;With CTE as
(select * , SUBSTRING(dates,0,charindex('/',dates)) dd
,SUBSTRING(stuff(dates,1,charindex('/',dates),''),0, charindex('/',stuff(dates,1,charindex('/',dates),''))) MM
,right(dates,2) yy
from #t
)
,CTE1 as
(
select *
,ROW_NUMBER()over(partition by yy,mm,dd order by yy,mm,dd)rn from cte c
)
select *, REPLICATE('0',2-len(dd))+cast(dd as varchar(2))
+REPLICATE('0',2-len(MM))+cast(MM as varchar(2))
+yy+REPLICATE('0',3-len(rn))+cast(rn as varchar(2))
from cte1