I have this code:
select DOLFUT from [DATABASE $]
How do I get it to get data from the 2nd line? (skip only the first line of data and collect all the rest)
You can use LIMIT to skip any number of row you want. Something like
SELECT * FROM table
LIMIT 1 OFFSET 10
SELECT * FROM tbl LIMIT 5,10; # Retrieve rows 6-15
To retrieve all rows from a certain offset up to the end of the result set, you can use some large number for the second parameter. This statement retrieves all rows from the 96th row to the last:
SELECT * FROM tbl LIMIT 95,18446744073709551615;
With one argument, the value specifies the number of rows to return from the beginning of the result set:
SELECT * FROM tbl LIMIT 5; # Retrieve first 5 rows
MySql docs
In Access, which you seem to use, you can use:
Select DOLFUT
From [DATABASE $]
Where DOLFUT Not In
(Select Top 1 T.DOLFUT
From [DATABASE $] As T
Order By 1)
Data in tables have no inherent order.
To get data from the 2nd line
, you have to set up some sort sequence and then bypass the first record of the set - as Gustav has shown.
In Sqlite we have table1 with column column1
there are 4 rows with following values for column1
(p1,p10,p11,p20)
DROP TABLE IF EXISTS table1;
CREATE TABLE table1(column1 NVARCHAR);
INSERT INTO table1 (column1) values ('p1'),('p10'),('p11'),('p20');
Select instr(',p112,p108,p124,p204,p11,p1124,p1,p10,p20,',','+column1+',') from table1;
We have to get the position of each value of column1 in the given string:
,p112,p108,p124,p204,p11,p1124,p1,p10,p20,
the query
Select instr(',p112,p108,p124,p204,p11,p1124,p1,p10,p20,',column1) from table1;
returns values
(2,7,2,17)
which is not what we want
the query
Select instr(',p112,p108,p124,p204,p11,p1124,p1,p10,p20,',','+column1+',') from table1;
returns 9 for all rows -
it turned out that it is the position of first "0" symbol ???
Howe we can get the exact positions of column1 in the given string in sqlite ??
In SQLite the concatenation operator is || and not + (like SQL Server), so do this:
Select instr(',p112,p108,p124,p204,p11,p1124,p1,p10,p20,',',' || column1 || ',') from table1;
What you did with your code was number addition which resulted to 0, because none of the string operands could succesfully be converted to number,
so instr() was searching for '0' and found it always at position 9 of the string:',p112,p108,p124,p204,p11,p1124,p1,p10,p20,'.
We have table called table1 with Tableindex as column. we need the maximum value of tableindex which must result as 3. Consider this table as example(table1),
Tableindex Creationdate Documentname Documentid
1 2017-01-18 11:59:06+0530 Document 1 Doc_1
2 2017-01-18 12:09:06+0530 Document 2 Doc_2
3 2017-01-18 01:09:06+0530 Document 3 Doc_3
In sql, we can select the max value using the following query,
"Select max(Tableindex) from table1;" // result in 3.
Similarly how can we get the max value in cassandra query. Is there Max function in cassandra. If not how can we get the max value?
Thanks in advance.
In Cassandra 2.2, the standard aggregate functions of min, max, avg, sum, and count are built-in functions.
SELECT MAX(column_name) FROM keyspace.table_name ;
https://docs.datastax.com/en/cql/3.3/cql/cql_using/useQueryStdAggregate.html
If you do select * from table1 limit 1, the result will give you row with MAX Tableindex .
There are better ways to do this with cassandra. you shoud know few things while designing cassandra tables.
1- Design your table for your queries.
2- Design to distributed data across the cassandra cluster.
You can upgrade to Cassandra higher version (2.2+) , it has built in max func.
Currently I´m doing this (get pagination and count), in Informix:
select a.*, b.total from (select skip 0 first 10 * from TABLE) a,(select count(*) total from TABLE) b
The problem is that I´m repeating the same pattern - I get the first ten results from all and then I count all the results.
I want to make something like this:
select *, count(*) from TABLE:
so I can make my query much faster. It is possible?
I'm trying to retrieve rows from a table where a subquery matches an variable. However, it seems as if the WHERE clause only lets me compare fields of the selected tables against a constant, variable or subquery.
I would expect to write something like this:
DATA(lv_expected_lines) = 5.
SELECT partner contract_account
INTO TABLE lt_bp_ca
FROM table1 AS tab1
WHERE lv_expected_lines = (
SELECT COUNT(*)
FROM table2
WHERE partner = tab1~partner
AND contract_account = tab1~contract_account ).
But obviously this select treats my local variable as a field name and it gives me the error "Unknown column name "lv_expected_lines" until runtime, you cannot specify a field list."
But in standard SQL this is perfectly possible:
SELECT PARTNER, CONTRACT_ACCOUNT
FROM TABLE1 AS TAB1
WHERE 5 = (
SELECT COUNT(*)
FROM TABLE2
WHERE PARTNER = TAB1.PARTNER
AND CONTRACT_ACCOUNT = TAB1.CONTRACT_ACCOUNT );
So how can I replicate this logic in RSQL / Open SQL?
If there's no way I'll probably just write native SQL and be done with it.
The program below might lead you to an Open SQL solution. It uses the SAP demo tables to determines the plane types that are used on a specific number of flights.
REPORT zgertest_sub_query.
DATA: lt_planetypes TYPE STANDARD TABLE OF s_planetpp.
PARAMETERS: p_numf TYPE i DEFAULT 62.
START-OF-SELECTION.
SELECT planetype
INTO TABLE lt_planetypes
FROM sflight
GROUP BY planetype
HAVING COUNT( * ) EQ p_numf.
LOOP AT lt_planetypes INTO DATA(planetype).
WRITE: / planetype.
ENDLOOP.
It only works if you don't need to read fields from TAB1. If you do you will have to gather these with other selects while looping at your results.
For those dudes who found this question in 2020 I report that this construction is supported since ABAP 7.50. No workarounds are needed:
SELECT kunnr, vkorg
FROM vbak AS v
WHERE 5 = ( SELECT COUNT(*)
FROM vbap
WHERE kunnr = v~kunnr
AND vkorg = v~vkorg )
INTO TABLE #DATA(customers).
This select all customers who made 5 sales orders within some sales organization.
In ABAP there is no way to do the query as in NATIVE SQL.
I would advice not to use NATIVE SQL, instead give a try to SELECT/ENDSELECT statement.
DATA: ls_table1 type table1,
lt_table1 type table of table1,
lv_count type i.
SELECT PARTNER, CONTRACT_ACCOUNT
INTO ls_table1
FROM TABLE1.
SELECT COUNT(*)
INTO lv_count
FROM TABLE2
WHERE PARTNER = TAB1.PARTNER
AND CONTRACT_ACCOUNT = TAB1.CONTRACT_ACCOUNT.
CHECK lv_count EQ 5.
APPEND ls_table1 TO lt_table1.
ENDSELECT
Here you append to ls_table1 only those rows where count is equals to 5 in selection of table2.
Hope it helps.