Using PostgreSQL I can have multiple rows of json objects.
select (select ROW_TO_JSON(_) from (select c.name, c.age) as _) as jsonresult from employee as c
This gives me this result:
{"age":65,"name":"NAME"}
{"age":21,"name":"SURNAME"}
But in SqlServer when I use the FOR JSON AUTO clause it gives me an array of json objects instead of multiple rows.
select c.name, c.age from customer c FOR JSON AUTO
[{"age":65,"name":"NAME"},{"age":21,"name":"SURNAME"}]
How to get the same result format in SqlServer ?
By constructing separate JSON in each individual row:
SELECT (SELECT [age], [name] FOR JSON PATH, WITHOUT_ARRAY_WRAPPER)
FROM customer
There is an alternative form that doesn't require you to know the table structure (but likely has worse performance because it may generate a large intermediate JSON):
SELECT [value] FROM OPENJSON(
(SELECT * FROM customer FOR JSON PATH)
)
no structure better performance
SELECT c.id, jdata.*
FROM customer c
cross apply
(SELECT * FROM customer jc where jc.id = c.id FOR JSON PATH , WITHOUT_ARRAY_WRAPPER) jdata (jdata)
Same as Barak Yellin but more lazy:
1-Create this proc
CREATE PROC PRC_SELECT_JSON(#TBL VARCHAR(100), #COLS VARCHAR(1000)='D.*') AS BEGIN
EXEC('
SELECT X.O FROM ' + #TBL + ' D
CROSS APPLY (
SELECT ' + #COLS + '
FOR JSON PATH, WITHOUT_ARRAY_WRAPPER
) X (O)
')
END
2-Can use either all columns or specific columns:
CREATE TABLE #TEST ( X INT, Y VARCHAR(10), Z DATE )
INSERT #TEST VALUES (123, 'TEST1', GETDATE())
INSERT #TEST VALUES (124, 'TEST2', GETDATE())
EXEC PRC_SELECT_JSON #TEST
EXEC PRC_SELECT_JSON #TEST, 'X, Y'
If you're using PHP add SET NOCOUNT ON; in the first row (why?).
Related
I have a CSV with some columns, one of them with JSON content. Can I query this JSON column with special handling?
An example below:
ei
My goal is to run a query (openrowset documentation) and get output similar to this.
ID
Name
0
Valarie Strickland
1
Mathews Harrison
2
Cecilia Giles
I tried to reproduce the same in my environment.
My sample data:
to convert the column with nested Json in the form of table. First, I created variable with nvarchar(max). set the select Querys value to it.
DECLARE #json nvarchar(max)
SET #json = (SELECT
TOP 100 *
FROM
OPENROWSET(
BULK 'https://dlsg2p.dfs.core.windows.net/fsn2p/jsoncolumn.csv',
FORMAT = 'CSV',
PARSER_VERSION = '2.0',
firstrow=3
) AS [result])
with below statement checking the value is assigned properly to variable.
select #json as JSON
Using CROSS APPLY for converting Json to table format:
SELECT b.id as ID ,b.name as Name
FROM
OPENJSON(#json)
WITH
(
friends NVARCHAR(MAX) AS JSON
) AS a
CROSS APPLY
OPENJSON(a.friends)
WITH
(
id INT,
name VARCHAR(MAX)
) AS b;
Execution:
Output:
I'm using Jooq to generate SQL
Here is resulting query
insert into MY_TABLE -- I want INSERT INTO(firstField,secondField)
select
?,
?
where not exists (
select 1
from MY_TABLE
where (
firstField = ?
)
)
returning id
MY_TABLE DDL:
create table IF NOT EXISTS MY_TABLE
(
id SERIAL PRIMARY KEY,
firstField int not null,
secondField int not null
)
I can't make Jooq add field names next to insert into MY_TABLE
My builder:
JooqBuilder.default()
.insertInto(table("MY_TABLE"))
.select(
select(
param(classOf[Int]), // 1
param(classOf[Int]), // 2
)
.whereNotExists(select(inline(1))
.from(table("MY_TABLE"))
.where(
DSL.noCondition()
.and(field("firstField", classOf[Long]).eq(0L))
)
)
).returning(field("id")).getSQL
I've tried
.insertInto(table("MY_TABLE"),field("firstField"), field("secondField"))
UPD:
I was confused by compiler exception.
The right solution is
```scala
JooqBuilder.default()
.insertInto(table("MY_TABLE"),
field("firstField",classOf[Int]),
field("secondField",classOf[Int])
)
.select(
select(
param(classOf[Int]),
param(classOf[Int])
)
.whereNotExists(select(inline(1))
.from(table("MY_TABLE"))
.where(
DSL.noCondition()
.and(field("firstField", classOf[Long]).eq(0L))
)
)
).returning(field("id")).getSQL
The thing is that Jooq takes field types from insertInto and doesn't compile if select field types don't match.
I've tried
.insertInto(table("MY_TABLE"),
field("firstField"),
field("secondField")
)
and it didn't compile since no match with
.select(
select(
param(classOf[Int]), // 1
param(classOf[Int]) // 2
)
I've added types to insertInto fields and got match, two ints in insert, two ints in select.
Jooq generated expected query
insert into MY_TABLE -- I want INSERT INTO(firstField,secondField)
select
?,
?
where not exists (
select 1
from MY_TABLE
where (
firstField = ?
)
)
jOOQ just generates exactly the SQL you tell it to generate. You're not listing firstField,secondField in jOOQ, so jOOQ doesn't list them in SQL. To list them in jOOQ, just add:
// ...
.insertInto(table("MY_TABLE"), field("firstField", classOf[Long]), ...)
// ...
Obviously, even without using the code generator, you can reuse expressions by assigning them to local variables:
val t = table("MY_TABLE")
val f1 = field("firstField", classOf[Long])
val f2 = field("secondField", classOf[Long])
And then:
// ...
.insertInto(t, f1, f2)
// ...
Using the code generator
Note that if you were using the code generator, which jOOQ recommends, your query would be much simpler:
ctx.insertInto(MY_TABLE, MY_TABLE.FIRST_FIELD, MY_TABLE.SECOND_FIELD)
.values(v1, v2)
.onDuplicateKeyIgnore()
.returningResult(MY_TABLE.ID)
.fetch();
I am having a issue getting this Sub-query to run. I am using Toad Data Point -Oracle. I get syntax error. I have tried several different ways with no luck. I am knew to sub-query's
Select *
from FINC.VNDR_ITEM_M as M
where M.ACCT_DOC_NBR = A.ACCT_DOC_NBR
(SELECT A.CLIENT_ID,
A.SRC_SYS_ID,
A.CO_CD,
A.ACCT_NBR,
A.CLR_DT,
A.ASGN_NBR,
A.FISCAL_YR,
A.ACCT_DOC_NBR,
A.LINE_ITEM_NBR,
A.MFR_PART_NBR,
A.POST_DT,
A.DRCR_IND,
A.DOC_CRNCY_AMT,
A.CRNCY_CD,
A.BSL_DT
FROM FINC.VNDR_ITEM_F A
WHERE A.CLR_DT IN (SELECT MAX(B.CLR_DT)
FROM FINC.VNDR_ITEM_F AS B
where (B.ACCT_DOC_NBR = A.ACCT_DOC_NBR and B.FISCAL_YR=A.FISCAL_YR and B.LINE_ITEM_NBR = A.LINE_ITEM_NBR and B.SRC_SYS_ID =A.SRC_SYS_ID and B.POST_DT=A.POST_DT and B.CO_CD=A.CO_CD)
and (B.CO_CD >='1000' and B.CO_CD <= '3000' or B.CO_CD ='7090') and (B.POST_DT Between to_date ('08/01/2018','mm/dd/yyyy')
AND to_date ('08/31/2018', 'mm/dd/yyyy')) and (B.SRC_SYS_ID ='15399') and (B.FISCAL_YR ='2018'))
GROUP BY
A.CLIENT_ID,
A.SRC_SYS_ID,
A.CO_CD,
A.ACCT_NBR,
A.CLR_DT,
A.ASGN_NBR,
A.FISCAL_YR,
A.ACCT_DOC_NBR,
A.LINE_ITEM_NBR,
A.MFR_PART_NBR,
A.POST_DT,
A.DRCR_IND,
A.DOC_CRNCY_AMT,
A.CRNCY_CD,
A.BSL_DT)
Your syntax is broken, you put subquery just at the end. Now it looks like:
select *
from dual as m
where a.dummy = m.dummy
(select dummy from dual)
It is in incorrect place, not joined, not aliased. What you should probably do is:
select *
from dual m
join (select dummy from dual) a on a.dummy = m.dummy
You also have some redundant, unnecessary brackets, but that's minor flaw. Full code (I cannot test it without data access):
select *
from FINC.VNDR_ITEM_M M
join (SELECT A.CLIENT_ID, A.SRC_SYS_ID, A.CO_CD, A.ACCT_NBR, A.CLR_DT, A.ASGN_NBR,
A.FISCAL_YR, A.ACCT_DOC_NBR, A.LINE_ITEM_NBR, A.MFR_PART_NBR, A.POST_DT,
A.DRCR_IND, A.DOC_CRNCY_AMT, A.CRNCY_CD, A.BSL_DT
FROM FINC.VNDR_ITEM_F A
WHERE A.CLR_DT IN (SELECT MAX(B.CLR_DT)
FROM FINC.VNDR_ITEM_F AS B
where B.ACCT_DOC_NBR = A.ACCT_DOC_NBR
and B.FISCAL_YR=A.FISCAL_YR
and B.LINE_ITEM_NBR = A.LINE_ITEM_NBR
and B.SRC_SYS_ID =A.SRC_SYS_ID
and B.POST_DT=A.POST_DT
and B.CO_CD=A.CO_CD
and (('1000'<=B.CO_CD and B.CO_CD<='3000') or B.CO_CD='7090')
and B.POST_DT Between to_date ('08/01/2018', 'mm/dd/yyyy')
AND to_date ('08/31/2018', 'mm/dd/yyyy')
and B.SRC_SYS_ID ='15399' and B.FISCAL_YR ='2018')
GROUP BY A.CLIENT_ID, A.SRC_SYS_ID, A.CO_CD, A.ACCT_NBR, A.CLR_DT, A.ASGN_NBR,
A.FISCAL_YR, A.ACCT_DOC_NBR, A.LINE_ITEM_NBR, A.MFR_PART_NBR, A.POST_DT,
A.DRCR_IND, A.DOC_CRNCY_AMT, A.CRNCY_CD, A.BSL_DT) A
on M.ACCT_DOC_NBR = A.ACCT_DOC_NBR and M.CO_CD=A.CO_CD;
You need to add an alias to the SubSelect (or Derived Table in Standard SQL):
select *
from
( select .......
) AS dt
join ....
Need help in writing u-sql query to fetch me top n percentage of rows.I have one dataset from which need to take total count of rows and take top 3% rows from dataset based on col1. Code which I have written is :
#count = SELECT Convert.ToInt32(COUNT(*)) AS cnt FROM #telData;
#count1=SELECT cnt/100 AS cnt1 FROM #count;
DECLARE #cnt int=SELECT Convert.ToInt32(cnt1*3) FROM #count1;
#EngineFailureData=
SELECT vin,accelerator_pedal_position,enginefailure=1
FROM #telData
ORDER BY accelerator_pedal_position DESC
FETCH #cnt ROWS;
#telData is my basic dataset.Thanks for help.
Some comments first:
FETCH currently only takes literals as arguments (https://msdn.microsoft.com/en-us/library/azure/mt621321.aspx)
#var = SELECT ... will assign the name #var to the rowset expression that starts with the SELECT. U-SQL (currently) does not provide you with stateful scalar variable assignment from query results. Instead you would use a CROSS JOIN or other JOIN to join the scalar value in.
Now to the solution:
To get the percentage, take a look at the ROW_NUMBER() and PERCENT_RANK() functions. For example, the following shows you how to use either to answer your question. Given the simpler code for PERCENT_RANK() (no need for the MAX() and CROSS JOIN), I would suggest that solution.
DECLARE #percentage double = 0.25; // 25%
#data = SELECT *
FROM (VALUES(1),(2),(3),(4),(5),(6),(7),(8),(9),(10),(11),(12),(13),(14),(15),(16),(17),(18),(19),(20)
) AS T(pos);
#data =
SELECT PERCENT_RANK() OVER(ORDER BY pos) AS p_rank,
ROW_NUMBER() OVER(ORDER BY pos) AS r_no,
pos
FROM #data;
#cut_off =
SELECT ((double) MAX(r_no)) * (1.0 - #percentage) AS max_r
FROM #data;
#r1 =
SELECT *
FROM #data CROSS JOIN #cut_off
WHERE ((double) r_no) > max_r;
#r2 =
SELECT *
FROM #data
WHERE p_rank >= 1.0 - #percentage;
OUTPUT #r1
TO "/output/top_perc1.csv"
ORDER BY p_rank DESC
USING Outputters.Csv();
OUTPUT #r2
TO "/output/top_perc2.csv"
ORDER BY p_rank DESC
USING Outputters.Csv();
I have a table T with CLOB column called XML_CLOB
Value in the column likes following:
<reportName>
<string>REPORT_A</string>
<string>REPORT_B</string>
<string>REPORT_C</string>
</reportName>
I'm trying to retrieve string value from this CLOB column and return in different rows. If I use
xmltype(xml_clob).extract('//reportName/string/text()').getstringval()
it outputs like 'REPORT_AREPORT_BREPORT_C' in the same row.
I also tried
extractValue(xmltype(xml_clob), '//reportName/string[1]')
but the problem is I don't know how much child values under tag
Is there anyway I can retrieve in different rows like:
1 REPORT_A
2 REPORT_B
3 REPORT_C
Many thanks in advance~
Oracle Setup:
CREATE TABLE table_name (xml_clob CLOB );
INSERT INTO table_name VALUES (
'<reportName>
<string>REPORT_A</string>
<string>REPORT_B</string>
<string>REPORT_C</string>
</reportName>'
);
Query 1:
SELECT x.string
FROM table_name t,
XMLTable('/reportName/string'
PASSING XMLType( t.xml_clob )
COLUMNS string VARCHAR2(50) PATH '/'
) x
Query 2:
SELECT EXTRACTVALUE( s.COLUMN_VALUE, '/string' ) AS string
FROM table_name t,
TABLE(
XMLSequence(
EXTRACT(
XMLType( t.xml_clob ),
'/reportName/string'
)
)
) s;
Output:
STRING
--------
REPORT_A
REPORT_B
REPORT_C
WITH test_table AS
(SELECT xmltype('<reportName>
<string>REPORT_A</string>
<string>REPORT_B</string>
<string>REPORT_C</string>
</reportName>' ) xml_clob
FROM dual
)
SELECT x.*
FROM test_table,
xmltable('/reportName/string'
passing test_table.xml_clob
columns report_name VARCHAR2(100) path 'text()') x