I want to count number of occurrences of a word in a string for example ,
[{"lastUpdatedDateTime":{"timestamp":1.54867752522E12},"messageStatus":"DELIVERED","phoneNumber":"+916000060000"},{"lastUpdatedDateTime":{"timestamp":1548677525220},"messageStatus":"DELIVERED","phoneNumber":"+916000060000"}]
in above string i want to count no of occurrences of a word 'DELIVERED' here it is 2.
i want to get result 2. pls help me on this. i should have to use only sql query to achieve this.
thanks in advance.
If your table's name is tablea and the column's name is col:
SELECT
(LENGTH(col) - LENGTH(REPLACE(col, '"DELIVERED"', '')))
/
LENGTH('"DELIVERED"') as counter
from tablea
remove every occurrence of "DELIVERED" and subtract the length of the string from the original string and finally divide the result with the length of "DELIVERED"
Assuming your data is in a table something like:
CREATE TABLE example(json TEXT);
INSERT INTO example VALUES('[{"lastUpdatedDateTime":{"timestamp":1.54867752522E12},"messageStatus":"DELIVERED","phoneNumber":"+916000060000"},{"lastUpdatedDateTime":{"timestamp":1548677525220},"messageStatus":"DELIVERED","phoneNumber":"+916000060000"}]');
and your instance of sqlite has the JSON1 extension enabled:
SELECT count(*) AS "Number Delivered"
FROM example AS e
JOIN json_each(e.json) AS j
WHERE json_extract(j.value, '$.messageStatus') = 'DELIVERED';
gives you:
Number Delivered
----------------
2
This will return the total number of matching entries from all rows in the table as a single value. If you want one result per row instead, it's an easy change but the exact details depend on your table definition. Adding GROUP BY e.rowid to the end of the query will work in most cases, though.
In the long run it's probably a better idea to store each object in the array as a single row in a table, broken up into the appropriate columns.
Related
I have a table as shown below
ID|Name|Address|Pincode
I1|Ramesh|Hyderabad|1234
I2|Bhaskar|india|1234
I2|Bhaskar|srilnaka|124
I3|Prasad|india|1234
I3|Prasad|india|1235
I4|Chandu|malaysia|1236
I4|Veeru|india|1236
I am required only one row for each ID wise and name,address and pincode should be comma separated values of all rows group by ID.
I want to get out put as shown below
ID|Name|Address|Pincode
I1|Ramesh|Hyderabad|1234
I2|Bhaskar|india,srilnaka|1234,124
I3|Prasad|india|1234,1235
I4|Chandu,veeru|malaysia,india|1236
Help me oracle query for getting the desired result
Take a look at LISTAGG function. You just have to group by id and apply this function to name, address and pincode
With NVARCHAR data type, I store my local language text in a column. I face a problem how to query that value from the database.
ዜናገብርኤልስ is stored value.
I wrote SQL like this
select DivisionName
from t_Et_Divisions
where DivisionName = 'ዜናገብርኤልስ'
select unicode (DivisionName)
from t_Et_Divisions
where DivisionName = 'ዜናገብርኤልስ'
The above didn't work. Does anyone have any ideas how to fix it?
Thanks!
You need to prefix your Unicode string literals with a N:
select DivisionName
from t_Et_Divisions
where DivisionName = N'ዜናገብርኤልስ'
This N prefix tells SQL Server to treat this string literal as a Unicode string and not convert it to a non-Unicode string (as it will if you omit the N prefix).
Update:
I still fail to understand what is not working according to you....
I tried setting up a table with an NVARCHAR column, and if I select, I get back that one, exact row match - as expected:
DECLARE #test TABLE (DivisionName NVARCHAR(100))
INSERT INTO #test (DivisionName)
VALUES (N'ዜናገብርኤልስ'), (N'ዜናገብርኤልስ,ኔትዎርክ,ከስተመር ስርቪስ'), (N'ኔትዎርክ,ከስተመር ስርቪስ')
SELECT *
FROM #test
WHERE DivisionName = N'ዜናገብርኤልስ'
This returns exactly one row - what else are you seeing, or what else are you expecting??
Update #2:
Ah - I see - the columns contains multiple, comma-separated values - which is a horrible design mistake to begin with..... (violates first normal form of database design - don't do it!!)
And then you want to select all rows that contain that search term - but only display the search term itself, not the whole DivisionName column? Seems rather pointless..... try this:
select N'ዜናገብርኤልስ'
from t_Et_Divisions
where DivisionName LIKE N'%ዜናገብርኤልስ%'
The LIKE searches for rows that contain that value, and since you already know what you want to display, just put that value into the SELECT list ....
I want to execute a SELECT query on a database table that has 6 key fields, let's assume they are keyA, keyB, ..., keyF.
As input parameters to my ABAP function module I do receive an internal table with exactly that structure of the key fields, each entry in that internal table therefore corresponds to one tuple in the database table.
Thus I simply need to select all tuples from the database table that correspond to the entries in my internal table.
Furthermore, I want to aggregate an amount column in that database table in exactly the same query.
In pseudo SQL the query would look as follows:
SELECT SUM(amount) FROM table WHERE (keyA, keyB, keyC, keyD, keyE, keyF) IN {internal table}.
However, this representation is not possible in ABAP OpenSQL.
Only one column (such as keyA) is allowed to state, not a composite key. Furthermore I can only use 'selection tables' (those with SIGN, OPTIOn, LOW, HIGH) after they keyword IN.
Using FOR ALL ENTRIES seems feasible, however in this case I cannot use SUM since aggregation is not allowed in the same query.
Any suggestions?
For selecting records for each entry of an internal table, normally the for all entries idiom in ABAP Open SQL is your friend. In your case, you have the additional requirement to aggregate a sum. Unfortunately, the result set of a SELECT statement that works with for all entries is not allowed to use aggregate functions. In my eyes, the best way in this case is to compute the sum from the result set in the ABAP layer. The following example works in my system (note in passing: using the new ABAP language features that came with 7.40, you could considerably shorten the whole code).
report zz_ztmp_test.
start-of-selection.
perform test.
* Database table ZTMP_TEST :
* ID - key field - type CHAR10
* VALUE - no key field - type INT4
* Content: 'A' 10, 'B' 20, 'C' 30, 'D' 40, 'E' 50
types: ty_entries type standard table of ztmp_test.
* ---
form test.
data: lv_sum type i,
lt_result type ty_entries,
lt_keys type ty_entries.
perform fill_keys changing lt_keys.
if lt_keys is not initial.
select * into table lt_result
from ztmp_test
for all entries in lt_keys
where id = lt_keys-id.
endif.
perform get_sum using lt_result
changing lv_sum.
write: / lv_sum.
endform.
form fill_keys changing ct_keys type ty_entries.
append :
'A' to ct_keys,
'C' to ct_keys,
'E' to ct_keys.
endform.
form get_sum using it_entries type ty_entries
changing value(ev_sum) type i.
field-symbols: <ls_test> type ztmp_test.
clear ev_sum.
loop at it_entries assigning <ls_test>.
add <ls_test>-value to ev_sum.
endloop.
endform.
I would use FOR ALL ENTRIES to fetch all the related rows, then LOOP round the resulting table and add up the relevant field into a total. If you have ABAP 740 or later, you can use REDUCE operator to avoid having to loop round the table manually:
DATA(total) = REDUCE i( INIT sum = 0
FOR wa IN itab NEXT sum = sum + wa-field ).
One possible approach is simultaneous summarizing inside SELECT loop using statement SELECT...ENDSELECT statement.
Sample with calculating all order lines/quantities for the plant:
TYPES: BEGIN OF ls_collect,
werks TYPE t001w-werks,
menge TYPE ekpo-menge,
END OF ls_collect.
DATA: lt_collect TYPE TABLE OF ls_collect.
SELECT werks UP TO 100 ROWS
FROM t001w
INTO TABLE #DATA(lt_werks).
SELECT werks, menge
FROM ekpo
INTO #DATA(order)
FOR ALL ENTRIES IN #lt_werks
WHERE werks = #lt_werks-werks.
COLLECT order INTO lt_collect.
ENDSELECT.
The sample has no business sense and placed here just for educational purpose.
Another more robust and modern approach is CTE (Common Table Expressions) available since ABAP 751 version. This technique is specially intended among others for total/subtotal tasks:
WITH
+plants AS (
SELECT werks UP TO 100 ROWS
FROM t011w ),
+orders_by_plant AS (
SELECT SUM( menge )
FROM ekpo AS e
INNER JOIN +plants AS m
ON e~werks = m~werks
GROUP BY werks )
SELECT werks, menge
FROM +orders_by_plant
INTO TABLE #DATA(lt_sums)
ORDER BY werks.
cl_demo_output=>display( lt_sums ).
The first table expression +material is your internal table, the second +orders_by_mat quantities totals selected by the above materials and the last query is the final output query.
What I currently have selects based on a column having the same value..
"SELECT * FROM users WHERE uuid = ?"
But what if I want to return a row based on one of the columns "containing" a string value? Some pseudo code would be:
SELECT * FROM users
WHERE column CONTAINS mystring
Any help is appreciated, I have been searching for other answers but to no avail.
SELECT * FROM users WHERE column LIKE '%mystring%' will do it.
LIKE means we're not doing an exact match (column = value), but doing some more fuzzy matching. "%" is a wildcard character - it matches 0 or more characters, so this is saying "all rows where the column has 0 or more chars followed by "mystring" followed by 0 or more chars".
Use LIKE clause.
E.g. if your string contains "pineapple123", your query would be:
SELECT * from users WHERE column LIKE 'pineapple%';
And if your string always starts with any number and ends with any number like "345pineapple4565", you can use:
SELECT * from users WHERE column LIKE "%pineapple%";
Checking variable substring ( a more generic answer )
you should use '%'||?||'%' instead
for example in python we'll have something like this:
curser.execute("SELECT * FROM users WHERE column LIKE '%'||?||'%'", (variable,) )
Just another way using instr, do not need to supply additional character.
Select * from repos where instr("column_name", "Search_string") > 1
I recently came across this problem and solved it such you can find the string 'time'
text = "SELECT * FROM database WHERE column=" + "'" + str(time) + "'"
cursor.execute(text)
The issue I found was that when you pass in the string time directly as:
..WHERE column=" + time)
it formats 'time' as "time" when you want it to format as 'time' which must be to do with the way SQLite is wrote to handle the arguments its passed.
I have time stamped all entries into a database and now I can recall any data from a specific time.
I would like to run a query involving joining a table to a manually generated list but am stuck trying to generate the manual list. There is an example of what I am attempting to do below:
SELECT
*
FROM
('29/12/2014', '30/12/2014', '30/12/2014') dates
;
Ideally I would want my output to look like:
29/12/2014
30/12/2014
31/12/2014
What's your Teradata release?
In TD14 there's STRTOK_SPLIT_TO_TABLE:
SELECT *
FROM TABLE (STRTOK_SPLIT_TO_TABLE(1 -- any dummy value
,'29/12/2014,30/12/2014,30/12/2014' -- any delimited string
,',' -- delimiter
)
RETURNS (outkey INTEGER
,tokennum INTEGER
,token VARCHAR(20) CHARACTER SET UNICODE) -- modify to match the actual size
) AS d
You can easily put this in a Derived Table and then join to it.
inkey (here the dummy value 1) is a numeric or string column, usually a key. Can be used for joining back to the original row.
outkey is the same as inkey.
tokennum is the ordinal position of the token in the input string.
token is the extracted substring.
Try this:
select '29/12/2014'
union
select '30/12/2014'
union
...
It should work in Teradata as well as in MySql.