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I have a SQL query where I want to order the database on type, order and category. Can I have query having all these three?
select * from t_person where name=xyz order by type,category,order
try this:
Use "" (double quotes) to escape the reserved keyword order
select * from t_person where name='xyz'
order by type,category,"order"
Use double quote for correct query:
select * from t_person where name='xyz' order by type,category,"order"
Related
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select count(*) as distinctname from
(select distinct nationalityname from dbo.profile)
Use an alias for your subqueries
select count(*) as distinctname from
(select distinct nationalityname from dbo.profile) alias_name
or make it simpler like this
select count(distinct nationalityname) from dbo.profile
Just give alias to sub-query
select count(*) as distinctname
from (select distinct nationalityname
from dbo.profile) t -- this is alias
In SQL Server, You need to give alias to sub-queries used in FROM clause.
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I am using 11g RDBMS and in one interview interviewer ask me that print 1 to 10 numbers using SQL query don't use loop if you are using PLSQL, means using select query he wants to see the result.
like Table:
1
2
3
Here are two approaches, both are SQL Server syntax, but you will find something similar for other RDBMs:
--ROW_NUMBER()
SELECT TOP 10 ROW_NUMBER() OVER(ORDER BY (SELECT NULL)) FROM sys.objects; --any table with more rows than 10 will do
--recursive CTE
WITH recursiveCounter AS
(
SELECT 1 AS Nr
UNION ALL
SELECT r.Nr+1
FROM recursiveCounter AS r
WHERE r.Nr<10
)
SELECT * FROM recursiveCounter
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I have a simple question: I would like to know how to display records from my database starting from the second record.
Thank you!
If you have a column that specifies the ordering, the ANSI standard way to do this is:
select t.*
from table t
order by col
offset 1 row;
Try this:
select * from
(select
*,
ROW_NUMBER() over (order by TableId) as rn
from TableName) dane where rn>1
in MSSQL.
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The following query
SELECT JOB_TYPE, CLASS, JOB_RUN_START, JOB_RUN_FINISH, JOB_STATUS, JOB_PID FROM
(SELECT * FROM ARCHIVE_JOBS ORDERBY JOB_RUN_START ASC ) WHERE ROWNUM <=6;
yields to an error:
ERROR at line 1: ORA-00907: missing right parenthesis
Anybody know why?
It's order by and you missed aliasing your subquery. I used X as alias name
SELECT JOB_TYPE, CLASS, JOB_RUN_START, JOB_RUN_FINISH, JOB_STATUS, JOB_PID
FROM
(
SELECT * FROM ARCHIVE_JOBS
ORDER BY JOB_RUN_START ASC
) X
WHERE ROWNUM <=6;
try to replace ORDERBY by ORDER BY
ORDERBY is not a keyword, so it's considered by mysql as in the FROM part of the query (i.e. a table), and table list should be separated by ,
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I want to use multiple CTEs in my query, but I haven't been able to get it working. The following is an example of what I would like to do:
WITH tbl1 AS
(SELECT *
FROM tblStuff)
WITH tbl2 AS
(SELECT tbl1.fldStuff1 ...
FROM tbl1, tblStuff2)
SELECT *
FROM tbl2
You only need to specify WITH once. Then you can list additional CTEs separated by a comma. E.g.:
WITH cte1 AS
(
...
),
cte2 AS
(
...
)
SELECT ...;
WITH tbl1 AS
(SELECT *
FROM tblStuff),
tbl2 AS
(SELECT tbl1.fldStuff1, tbl1.fldStuff2, tblStuff2.fldStuff1, tblStuff2.fldStuff2
FROM tbl1, tblStuff2)
SELECT *
FROM tbl2
When you use multiple CTEs, no need for the extra WITH, seperate with a comma.