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How to find relation of a table with different table?
Hope that helps Unless you know data model (or know someone else who does), I don't see a way to do that. Suppose all tables contain column named ID; how will you know whether some of them represent referential integrity (or not), if there's no such
TAG :sql
Date : August 05 2020, 06:00 AM , By : Sam Sunderland
Too many subselects in Oracle Query?
fixed the issue. Will look into that further I would recommend identifying the SQL id for the query then using the SQL Monitor Report as it will tell you exactly what the execution plan is and where the SQL is spending most of it's time.A simple way
TAG :sql
Date : August 05 2020, 01:00 AM , By : Tracia Ooink
3 inputs for a oracle sql query
it fixes the issue You want the date range check anyway, then you either want all users or a specified user; so you can check if you were given a username:
TAG :sql
Date : August 05 2020, 01:00 AM , By : Anand
No matching signature for operator AND for argument types: BOOL, TIME. Supported signature: BOOL AND ([BOOL, ...])
wish help you to fix your issue Hello this is the query I am using to get data , The error seems pretty clear. You need a comparison:
TAG :sql
Date : August 05 2020, 12:00 AM , By : johnnyzhang
SQL Server One Foreign Key From 2 Tables
I wish did fix the issue. Yes, you can have a column (or tuple of columns) to reference multiple tables as foreign keys. I [personally] call them "forking foreign keys", but that's just me.However, those are TWO separate constraints that are enforced
TAG :sql
Date : August 05 2020, 12:00 AM , By : Price Chen
Joining With No Key - SQL
around this issue Please use the code below to help understand my situation. Essenetially I have the first two tables and I want to create table_3 but I do not know how because their is nothing to join on, I do not think a Union is the best call..so
TAG :sql
Date : August 04 2020, 10:00 PM , By : Arkady Khaikin
Is there a way to simplify this SQL function? I feel like its redundant
wish help you to fix your issue just not sure if I'm doing this the best possible way. Is there a way I can shorten it? It works with what im looking for, but im trying to learn and not sure if this statement is redundant? , I recommend writing this
TAG :sql
Date : August 04 2020, 10:00 PM , By : Siamul Haq Ratul
Select in where condition is slow
hope this fix your issue I think the performance perspective EXISTS is better than the IN clause. Since IN clause internally convert to OR conditions(resulting in more conditions)Try this script and compare the query execution plan and execution time
TAG :sql
Date : August 04 2020, 07:00 PM , By : Roberto Scheinkman
Need correction
With these it helps Whats wrong with this query. , You don't need a JOIN for this. You can use KEEP:
TAG :sql
Date : August 04 2020, 05:00 PM , By : Pingster
SQL : select unmatching records from 2 tables
hop of those help? I have 2 tables and I want to retrieve the rows from the first table where the id_apartment does not appear in the second table: , You can use not exists:
TAG :sql
Date : August 04 2020, 12:00 PM , By : Peter Kristianto Wid
CTE for last non-null value
I wish did fix the issue. The "correct" way is lag(ignore nulls), but SQL Server does not implement that yet.If the values are always increasing, you can use a cumulative max:
TAG :sql
Date : August 04 2020, 11:00 AM , By : Noufel Bouaouina
Emulating fixed point numbers in postgres?
it should still fix some issue If you want fixed point values with three decimal points, then define the columns as numeric(4, 3)/decimal(4, 3).This is what numeric is for. Don't start fiddling with trying to use other types, when a built-in mechanis
TAG :sql
Date : August 04 2020, 10:00 AM , By : Harshraj Mahesh
Cant use Group by - Showing Error : column must appear in the GROUP BY clause or be used in an aggregate function
this one helps. If you select 4 columns and not even one of them is a part of aggregation function then you need to put them all in the group by clause. So this would be the code without error:
TAG :sql
Date : August 04 2020, 04:00 AM , By : Olvin Camara
SQL - Dropping a user on all databases on an instance without a cursor or sp_foreach
I think the issue was by ths following , I did write something a little while ago that might work for this, which doesn't use a CURSOR to run commands through databases, that I called sp_foreachdatabase: A CURSOR free version of sp_msforeachdb. The d
TAG :sql
Date : August 03 2020, 10:00 PM , By : Maria
jsonb gin index not being used in postgresql
should help you out You can not index the results of a set returning function (other than making a materialized view).We can reason out that if a.accounts @> '{"role": "ADVISOR"}' than it is necessary that t.accounts @> '[{"role": "ADVISOR"}]'. Postg
TAG :sql
Date : August 03 2020, 08:00 PM , By : user6111185
Select all records from one table that do not exist in another table?
will be helpful for those in need Table A , just don't do the join
TAG :sql
Date : August 03 2020, 08:00 PM , By : Doug McNelly
Is there a quick way to separate date and time from a time stamp in sql?
fixed the issue. Will look into that further I am not sure if I understand what you need but I will try:Your question: "Is there a quick way to separate date and time from a time stamp in sql?"
TAG :sql
Date : August 03 2020, 06:00 PM , By : Iago Nunes Guimaraes
Perform SELECT statement inside of SELECT Statement?
Hope this helps I'm using Emp, Dept... databases. I would like to get the Name, Salary, Deptno and Average salary in the department of those employees who earn more than the average of their department. So here is what I'm trying to do: , You would u
TAG :sql
Date : August 03 2020, 06:00 PM , By : Nerkan
how can I subtract time from a date time field to adjust a date time field?
I think the issue was by ths following , I currently have a datetime field in the following format: "2019-07-07 15:00:00 UTC". However, this date is an hour and 25 minutes ahead of what it should be. How can I subtract 1 hour and 25 minutes from this
TAG :sql
Date : August 03 2020, 05:00 PM , By : Mai ElBasry
What is the most efficient way to randomly sample with replacement in BigQuery?
Hope that helps Found a neat solution: Index the rows of the table Generate a dummy table with 100K random integers between 1 and 1M Inner join the tables on index = random value
TAG :sql
Date : August 03 2020, 04:00 PM , By : Brooke Linney
SQL WHERE statement in SELECT?
With these it helps So I'm trying to output 2 columns that call on the same feature. Except 1 column I want the count of values less than 5 and another column I want count of values greater than 5. , Try this
TAG :sql
Date : August 03 2020, 03:00 PM , By : pazit
Split SQL Column value and save count and results
Hope that helps Never heard of SOQL before but depending on how predictable and stable c_services column is, you could do try this.
TAG :sql
Date : August 03 2020, 03:00 PM , By : Anna Mitkova Grozeva
Create a loop to label dates base on month without the use of many multiple 'case', 'between'
This might help you You should be using a date function which already exists in SQL Server. FORMAT is one such option:
TAG :sql
Date : August 03 2020, 07:00 AM , By : Enzod
plsql store procedure loop compare value
With these it helps You can check and return true or false string values through a single SQL Select statement by
TAG :sql
Date : August 03 2020, 04:00 AM , By : Jeff McNeill
What is the fastest way to find if a column has at least one NULL value in ORACLE database?
To fix this issue If your table has one null value hiding among a billion rows, finding it is usually going to require a full scan of the whole table (stopping when it finds one).That's true for the answers using various SQL forms, answers based on g
TAG :sql
Date : August 03 2020, 02:00 AM , By : Abhijit Das
Get the no of consecutive days a Field value is Stale
wish helps you This is a gaps and islands problem.You can use lag() to retrieve the previous rate for the same currencies tuple, and then do a window sum to define groups of consecutive records with the same rate. Then, you can aggregate the groups,
TAG :sql
Date : August 02 2020, 11:00 PM , By : Sayali
How to find the imporper data that cause ORA-01436
I hope this helps . You should indeed use NOCYCLE to avoid the infinite loop. On top of that, you can use CONNECT_BY_ISCYCLE to identify the offending row(s):
TAG :sql
Date : August 02 2020, 02:00 PM , By : Abhijeet Naik
Why adding "AS" in SQL statement "FROM" cause error?
Hope this helps as is not allowed for table aliases in Oracle (although it is allowed in every (or almost every) other database.That said, here are two alternative ways to write your query that may be more efficient:
TAG :sql
Date : August 01 2020, 06:00 PM , By : Sytze van der Meulen
Postgres SQL - copy data from one column to another and if null from another one
Any of those help I need a help with some challenge , Perhaps COALESCE is what you want here with an update:
TAG :sql
Date : August 01 2020, 06:00 AM , By : Īåm Büshrã
Best approach for generating a non-predictable random ID?
wish helps you Use a normal INTEGER PRIMARY KEY column, but don't use AUTOINCREMENT (Which you usually don't want to use anyways). Then insert a row with a rowid of 9223372036854775807, the largest possible one. Further insertions without a rowid giv
TAG :sql
Date : August 01 2020, 04:00 AM , By : JarrodD
Best way to store an array considering all matches like query?
this will help At first I thought you might be able to use the ARRAY_OVERLAP( ) function, but it appears that will provide you with a TRUE if there are any matches, not all elements match.https://docs.snowflake.net/manuals/sql-reference/functions/arr
TAG :sql
Date : August 01 2020, 02:00 AM , By : Jeffrey Johnson
Different results in queries
like below fixes the issue I have two similar queries: , It has a time component. The correct logic is:
TAG :sql
Date : August 01 2020, 02:00 AM , By : Miss_Sophy
Simple sql query that matches any database (MS SQL)
Any of those help I have some monitoring soft, that able to make to MS SQL DB. if the request was successful - monitoring system says "DB - Ok". If query was unsuccessful, DB - fail. , You don't need a table. You can just use:
TAG :sql
Date : July 31 2020, 09:00 PM , By : idleBishop
WHERE at least one of multiple columns in date range
I hope this helps . The only way you can improve your query imho is using placeholders as @Jeff Holt mentioned. But it won't change the executed SQL in the end.Another possibility (but that totally depends on your requirements) is seperating the 'id'
TAG :sql
Date : July 31 2020, 06:00 PM , By : Nick McCrea
How to add a numerical value into a window frame in SQLite?
will help you I am having some difficulty in adding a numerical digit into my windows frame specification in SQLite. I am using R in SQLITE. Although if you know how to do this in SQL then that's also helpful. , I think that you want:
TAG :sql
Date : July 31 2020, 02:00 PM , By : Baduq
How To Check Numerical Format in SQL Server 2008
it should still fix some issue What you want to do does not make sense in SQL Server.Oracle supports a number data type that has a variable precision:
TAG :sql
Date : July 31 2020, 11:00 AM , By : Daniel Gerlag
Delete duplicate values
I think the issue was by ths following , It deletes all ENAMEs, not only duplicates (i.e. it doesn't leave one row). Try something likeTable contents at beginning:
TAG :sql
Date : July 31 2020, 09:00 AM , By : Jstall
Reset ROW_NUMBER() after break
This might help you I have the following SQL Server query on which i'm having some trouble using ROW_NUMBER(). , You need nested Analytic Functions:
TAG :sql
Date : July 31 2020, 04:00 AM , By : Ljouad Tarik
Fill Zero values with Previous Non Zero Values in SQL Server
help you fix your problem I'm trying to fill the zero values of all rows with the previously given dividend data. How do fill the zero values with the previously given dividend and also do that for all given rows in MS SQL server?
TAG :sql
Date : July 30 2020, 02:00 AM , By : Maxwell Hill
help you fix your problem The substring() function extracts part of string (from the column attribute_name) from the position numbered x for y characters (or until position x + y - 1). For instance 1 to 3 would be the first three characters.This is t
TAG :sql
Date : July 29 2020, 05:00 PM , By : Cameron Williams
Convert HashBytes to VarChar
it fixes the issue I want to get the MD5 Hash of a string value in SQL Server 2005. I do this with the following command: , I have found the solution else where:
TAG :sql
Date : July 28 2020, 03:00 PM , By : user72001
What is the best way to handle multiple permission types?
With these it helps I agree with John Downey.Personally, I sometimes use a flagged enumeration of permissions. This way you can use AND, OR, NOT and XOR bitwise operations on the enumeration's items.
TAG :sql
Date : July 27 2020, 04:00 PM , By : Jay
How do I index a database column
it helps some times The following is SQL92 standard so should be supported by the majority of RDMBS that use SQL:
TAG :sql
Date : July 26 2020, 08:00 PM , By : soonk
How does database indexing work?
this will help Why is it needed?When data is stored on disk-based storage devices, it is stored as blocks of data. These blocks are accessed in their entirety, making them the atomic disk access operation. Disk blocks are structured in much the same
TAG :sql
Date : July 26 2020, 05:00 PM , By : Ian Thake
Why doesn't SQL Full Text Indexing return results for words containing #?
I wish did fix the issue. The char is indexed as punctuation and therefore ignored, so it looks like we'll remove the letter C from our word indexing ignore lists.Tested it locally after doing that and rebuilding the indexes and I get results!
TAG :sql
Date : July 26 2020, 10:00 AM , By : dfrolov
Swap unique indexed column values in database
To fix this issue I think you should go for solution 2. There is no 'swap' function in any SQL variant I know of.If you need to do this regularly, I suggest solution 1, depending on how other parts of the software are using this data. You can have lo
TAG :sql
Date : March 29 2020, 07:55 AM , By : Pug
Is there a version control system for database structure changes?
I hope this helps you . In Ruby on Rails, there's a concept of a migration -- a quick script to change the database.You generate a migration file, which has rules to increase the db version (such as adding a column) and rules to downgrade the version
TAG :sql
Date : March 29 2020, 07:55 AM , By : nslindtner
Check for changes to an SQL Server table?
This might help you How can I monitor an SQL Server database for changes to a table without using triggers or modifying the structure of the database in any way? My preferred programming environment is .NET and C. , Take a look at the CHECKSUM comman
TAG :sql
Date : March 29 2020, 07:55 AM , By : mocco
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