Select NULL otherwise latest date per group
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I am trying to pickup Account with End Date NULL first then latest date if there are more accounts with the same item
Select distinct * from Sample where End Date is null
Need help to display the output.
According to sample it seems to me you need union and not exists corelate subquery
select * from table_name t where t.enddate is null union select * from table_name t where t.endate=( select max(enddate) from table_name t1 where t1.Item=t.Item and t1.Account=t.Account) and not exists ( select 1 from table_name t2 where enddate is null and t1 where t2.item=t.item )
MAX DATE With NULL VALUE, with ct as ( select id, Parent, Date, row_number() over (partition by id order by id THEN NULL ELSE MAX(Date) END as Date from Table T2 where T1.id= T2.id. The order of the remaining terms in the coalesce statement is unimportant. e.g. on a table with three date columsn: with x as ( select 1 id, sysdate dte1, sysdate-1 dte2, sysdate+1 dte3 from dual union select 2, sysdate, null, null from dual union select 3, null, sysdate-1, null from dual union select 4, null, sysdate-1, sysdate+1 from dual
Select * from Sample order by End_Date is not null, End_date desc
How to select the set of last non-NULL values per column over a , Using the concatenation technique from The Last non NULL Puzzle by Itzik Ben Gan would look like this with your sample table and column select rownum row_id, acc_ident from (select acc_ident from txn_dtls where acc_ident is not null and debit is not null group by acc_ident order by acc_ident) where rownum<=6)b where a.acc_ident=b.acc_ident and debit is not null order by a.acc_ident, value_date, stmt_no, seq_no, id,debit option -2 select * from
SELECT * FROM YourTable ORDER BY End_Date IS NOT NULL, End_Date DESC
group by and having clauses, select type, avg (price) from titles where advance > 7000 group by all type “NULL” in the aggregate column indicates groups that would be excluded by having search conditions can include aggregate expressions; otherwise, An extended column affects the display of final results, since additional rows are displayed. I have an existing query that I need to update the max date to read min of the max date in another table or last day of the current month. Sound confusing let me explain further. My current query looks like this (I didn't write it, I used it from someone else): let ChangedType = Table.TransformCol
Chapter 16 SQL Data Manipulation Language – Database Design , The SQL data manipulation language (DML) is used to query and modify The final two examples illustrate how NULL and NOT NULL can be used to select records. LIKE is used with char, varchar, text, datetime and smalldatetime data. The GROUP BY clause is used to create one output row per each group and Hi All, In my query editor, i have several of files. The files are naming based on <plant_filename_date> In the query editor, there are files from the same plant but different date. Can i have filter in query editor, just for 1 file for the same plant with the lastest date?
First of all you should state clearly which result rows you want: You want one result row per Item and TOU. For each Item/TOU pair you want the row with highest date, with null having precedence (i.e. being considered the highest possible date).
Is this correct? Does that work with your real accounts? In your example it is always that all rows for one account have a higher date than all other account rows. If that is not the case with your real accounts, you need something more sophisticated than the following solution.
The highest date you can store in MySQL is 9999-12-31. Use this to treat the null dates as desired. Then it's just two steps:
- Get the highest date per item and tou.
- Get the row for these item, tou and date.
select * from sample where (item, tou, coalesce(enddate, date '9999-12-31') in ( select item, tou, max(coalesce(enddate, date '9999-12-31')) from sample group by item, tou ) order by item, tou;
(If it is possible for your enddate to have the value 9999-12-31 and you want null have precedence over this, then you must consider this in the query, i.e. you can no longer simply use this date in case of null, and the query will get more complicated.)
Use Queries to show records based on conditions – Documentation , 2 In this tutorial, you will learn how to use Query statements in Awesome Table syntax; Select and Order by; Limit; Where with Criteria; Where with Dates Explanation: Select all columns and only show the Top 5 candidates whose Final Score Explanation: To avoid displaying blank rows or blank cards in your app, you Hi, Chipniz wrote: Hi In the table EMP, there is a column named "HIREDATE". I would like to replace the date value '17/12/80' (format DD/MM/YYYY) in the output of the select statement by a null value.
MAX(<date>) / GROUP BY behaviour, I do get the latest date but the values for the columns date1, date2, date3 and date4 are not int(10) unsigned NOT NULL, `key2` varchar(5) NOT NULL, `key3` date NOT NULL, MariaDB allow non-aggregate columns that are not included in the GROUP BY clause. If you rewrite the query, you'll get consistent results: If the select list and GROUP BY columns of a top-level query or of a subquery do not match, then the statement results in ORA-00979. Expressions involving the preceding expressions that evaluate to the same value for all rows in a group . You can select a rowid from a join view only if the join has one and only one key-preserved table.
Functions - Spark SQL, Built-in Functions, expr1 = expr2 - Returns true if expr1 equals expr2 , or false otherwise. Arguments current_date() - Returns the current date at the start of query evaluation. Since: 1.5. first(expr[, isIgnoreNull]) - Returns the first value of expr for a group of rows. last_day(date) - Returns the last day of the month which the date belongs to. Similar to the IS NULL operator, we can rely on the fact that IS NOT NULL returns 1 when expression is NOT NULL, and 0 otherwise. Query: SELECT * FROM user ORDER BY date_login IS NOT NULL, date_login DESC Using !ISNULL() is equivalent to IS NOT NULL, so either one could be used. The same query could also be rewritten using IS NULL like so:
Spark SQL, Built-in Functions, The final state is converted into the final result by applying a finish function. both non-empty and either of them contains a null element null is returned, false otherwise. current_date() - Returns the current date at the start of query evaluation. first(expr[, isIgnoreNull]) - Returns the first value of expr for a group of rows. We have many tables with start/end dates, and we often query rows where a particular date, say sysdate, falls between them. I've always seen done this way: A: select * from table where (end_date is null or end_date >= sysdate) Sometimes I found this tedious to write, like when the column name was really long, so I started doing it this way:
- In your example it is always that all rows for one account have the same date. This is probably not the case in your real database. (If it is then you are violating database normalization and you should make this a separate account table instead, where the date is stored only once per account.) So which account would you choose if account 1 had one record for 2018-01-01 and one record for 2018-03-03? Would you choose account 1 or 2?
- In your example it is always two rows per account, one for Peak and one for Off Peak. Is this always the case? If not, e.g. if there would be no Off Peak record for account 1, would you still want to show it? One row (Peak) only? Or two rows from different accounts, e.g. Peak of account 1 and Off Peak of account 2?
- BTW: With MySQL you should always mention which version you are using. There is a lot that has been added in MySQL 8, so this might affect the answers you are getting.
- Please see: How to accept an answer for closure. Thanks :)
- @ Thorsten Kettner, As per account, there will be there type of TOU, Total, Peak, Off Peak and the consumption always having with TOU. The actually table will have more columns of records. Trying to filter out unnecessary accounts and keep the latest and null as max with items.
- Yes. The NULL END date will be used as the highest if there are more accounts with the same item. if the end date is not null and have more accounts with end date, will pick up the highest END date.