I want to use numerical greater than operator in like clause in hive sql.
select col1,col2
from table_1
where NOT (col_3 RLIKE 'p=2')
instead of 'p=2' i want to eliminate all the values where p>2
How can i achieve that?
Any leads would be appreciated.
TIA
Related
Currently I'm trying to fetch the records which are matching my condition.
I'm using wildcard operator but it's not fetching the records as I expect.
I have multiple records in my table and I'm using the query below:
select *
from My_table
where RegNum like '117[15-24]%'
I thought above query will fetch the records from 11715 to 11724, but currently it's fetching records from 11710 to 11719. I got to know that % wildcard operator will consider single digits only.
Is there any other way to use two digit number in wildcard operator or is there any other solution to fetch the records what I'm looking for?
I speculate that you are using SQL Server. When comparing numerical ranges, the best thing to do is to just use an inequality. If your RegNum column is text, then cast it to integer first and then compare:
SELECT *
FROM My_table
WHERE (CAST RegNum AS int) BETWEEN 11715 AND 11724;
If you want to use LIKE, we might be able to try:
SELECT *
FROM My_table
WHERE RegNum LIKE '1171[5-9]' OR RegNum LIKE '1172[0-4]';
The logic you want is perhaps better captured by:
where left(regnum, 5) between '11715' and '11724'
Not all databases support left(), in those, use the substring function instead.
You have a logic fallacy in wanting to use like for numeric ranges. like is for strings. If you want numeric ranges, use numbers. You could do this with the above condition:
where cast(left(regnum, 5) as int) between 11715 and 11724
But this is logically equivalent to the original string comparison.
I am trying to concatenate multiple columns in a query in SQL Server 11.00.3393.
I tried the new function CONCAT() but it's not working when I use more than two columns.
So I wonder if that's the best way to solve the problem:
SELECT CONCAT(CONCAT(CONCAT(COLUMN1,COLUMN2),COLUMN3),COLUMN4) FROM myTable
I can't use COLUMN1 + COLUMN2 because of NULL values.
EDIT
If I try SELECT CONCAT('1','2','3') AS RESULT I get an error
The CONCAT function requires 2 argument(s)
Through discourse it's clear that the problem lies in using VS2010 to write the query, as it uses the canonical CONCAT() function which is limited to 2 parameters. There's probably a way to change that, but I'm not aware of it.
An alternative:
SELECT '1'+'2'+'3'
This approach requires non-string values to be cast/converted to strings, as well as NULL handling via ISNULL() or COALESCE():
SELECT ISNULL(CAST(Col1 AS VARCHAR(50)),'')
+ COALESCE(CONVERT(VARCHAR(50),Col2),'')
SELECT CONCAT(LOWER(LAST_NAME), UPPER(LAST_NAME)
INITCAP(LAST_NAME), HIRE DATE AS ‘up_low_init_hdate’)
FROM EMPLOYEES
WHERE HIRE DATE = 1995
Try using below:
SELECT
(RTRIM(LTRIM(col_1))) + (RTRIM(LTRIM(col_2))) AS Col_newname,
col_1,
col_2
FROM
s_cols
WHERE
col_any_condition = ''
;
Blockquote
Using concatenation in Oracle SQL is very easy and interesting. But don't know much about MS-SQL.
Blockquote
Here we go for Oracle :
Syntax:
SQL> select First_name||Last_Name as Employee
from employees;
Result: EMPLOYEE
EllenAbel
SundarAnde
MozheAtkinson
Here AS: keyword used as alias.
We can concatenate with NULL values.
e.g. : columnm1||Null
Suppose any of your columns contains a NULL value then the result will show only the value of that column which has value.
You can also use literal character string in concatenation.
e.g.
select column1||' is a '||column2
from tableName;
Result: column1 is a column2.
in between literal should be encolsed in single quotation. you cna exclude numbers.
NOTE: This is only for oracle server//SQL.
for anyone dealing with Snowflake
Try using CONCAT with multiple columns like so:
SELECT
CONCAT(col1, col2, col3) AS all_string_columns_together
, CONCAT(CAST(col4 AS VARCHAR(50), col1) AS string_and_int_column
FROM table
If the fields are nullable, then you'll have to handle those nulls. Remember that null is contagious, and concat('foo', null) simply results in NULL as well:
SELECT CONCAT(ISNULL(column1, ''),ISNULL(column2,'')) etc...
Basically test each field for nullness, and replace with an empty string if so.
Is there any generic command or syntax in SQL to allow one to have multiple values in a where statement without using OR?
OR just gets tedious when you have many values to choose from and you only want say half of them.
I want to return only columns that contain certain values. I am using Cache SQL, but as I said, a generic syntax might be helpful as well because most people are unfamiliar with Cache SQL. Thanks!
You should use IN:
... where column_name in ('val1', 'val2', ...);
Use the 'IN' clause.
SELECT * FROM product WHERE productid IN (1,2,3)
I believe you are looking for the IN clause.
Determines whether a specified value matches any value in a subquery or a list.
I'm using SQLite database and I'm wondering whether I'm allowed to write queries as follows:
SELECT SUM(column1 * column2)
FROM my_table;
I googled but references say that SUM function is has the following format:
SUM([DISTINCT|ALL] column)
And my question is: does column mean actually column or does it allow expressions (like above) too?
You can always use a table expression:
SELECT SUM(Calc)
FROM (
SELECT Column1 * Column2 AS 'Calc'
FROM My_Table) t
I don't have SQLite but checking the docs indicates this should work fine.
Yes, you can use an expression like the one you mentioned, if the datatype of both columns allow it.
I've written an SQL query with a lot of 'or's in the 'where' clause:
i.e.
"SELECT * FROM myTable WHERE col1='a' or col1='b' or col1='c'...etc"
I'm trying to run a query in access via vb.net, but I keep getting "Query is too complex" error message.
I'm guessing I've hit some maximum limit. Anyone know a way around this, other than just to break it down into multiple queries?
How about using the IN operator instead?
SELECT Field1, Field2
FROM Table1
WHERE Field1 IN('Val1','Val2', ....)
If you query is that simple would you not be better using
SELECT * FROM myTable WHERE col1 in ('a','b','c')
but it would help to post the actual query so we can give a accurate answer
You could use SQL IN operator instead having multiple OR conditions.
You can use IN as in -
SELECT * FROM myTable WHERE col1 IN ('a','b','c','d');
Many have stated that you should use the IN-operator instead, but when that is used together with constants I believe the optimiser simply converts that to an OR-operator.
Instead you could load a temporary table with your constants and then use the IN-operator with that table.