Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. ANY is a later, more versatile addition, it can be combined with any binary operator returning a boolean value. IN burns down to a special case of ANY.
In fact, its second form is rewritten internally:. The choice should be decided by what's easier to provide : a list of values or an array possibly as array literal - a single value.
If the IDs you are going to pass come from within the DB anyway, it is much more efficient to select them directly subquery or integrate the source table into the query with a JOIN like mu commented. To pass a long list of values from your client and get the best performanceuse an array, unnest and join, or provide it as table expression using VALUES like PinnyM commented.
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Asked 4 years, 9 months ago. Active 7 months ago. Viewed 16k times. I used to have a query like: MyModel. I created this: MyModel. Erwin Brandstetter k 90 90 gold badges silver badges bronze badges.
Eki Eqbal Eki Eqbal 3, 5 5 gold badges 34 34 silver badges 66 66 bronze badges. You need to be careful to properly escape any raw values being injected into your SQL. What's the purpose of this query?
Using Array Values in IN clause of a select Query
Where are all these ids coming from? Maybe you should be JOINing or using a subquery instead of sending a big list of ids to the database. I provided details.
This answer contains a severe SQL injection vulnerability. Do NOT use the code samples as presented here, without making sure that any external input is sanitized.
We can build an expression to place inside the from our array. Note that there must be at least one value inside the parenthesis or MySQL will return an error; this equates to making sure that our input array has at least one value. To help prevent against SQL injection attacks, first generate a? Again note that there is a? It is easy to change between strings and integers because of the bound parameters.
You need to check for the usual errors for each database method or set your DB driver to throw exceptions. Again I've omitted some error checking for brevity. As Flavius Stef's answeryou can use intval to make sure all id are int values:. For MySQLi with an escape function:. We should take care of SQL injection vulnerabilities and an empty condition. I am going to handle both as below. For a pure numeric array, use the appropriate type conversion viz intval or floatval or doubleval over each element.
MySQL allows numbers as well as date variants as string. Such a function would most likely be already available to you in your application, or maybe you've already created one. A numeric array can be sanitized using intval or floatval or doubleval instead as suitable:.
One can also use OR instead, but the problem remains. TIP : If you want to show all records no filtering in case of an empty array instead of hiding all rows, simply replace 0 with 1 in the ternary's false part. Shrapnel's SafeMySQL library for PHP provides type-hinted placeholders in its parametrised queries, and includes a couple of convenient placeholders for working with arrays.
Like the example below:. This way you can manage a simple n2m database relation without an extra table and using only SQL without the need to use PHP or some other programming language. You can use looping to get the exact data you want or you can use the query with OR case.
Because the original question relates to an array of numbers and I am using an array of strings I couldn't make the given examples work.
I found that each string needed to be encapsulated in single quotes to work with the IN function. Below is the method I have used, using PDO with named placeholders for other data. To overcome SQL injection I am filtering the array to accept only the values that are integers and rejecting all others.
Using prepared statements and parameterized queries query is considered the better practice, but if you choose the escaping characters method then you can try my example below. Alternatives to this function include:. Learn more. Asked 10 years, 10 months ago. Active 2 months ago. Viewed k times. Braiam 4, 11 11 gold badges 41 41 silver badges 66 66 bronze badges. Quinn Quinn.GitHub is home to over 40 million developers working together to host and review code, manage projects, and build software together.
Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community. Already on GitHub? Sign in to your account. Eloquent's database where ; method returns different queries when it should not. The query is essentially the same, as is the output, but the second query is encapsulated while the first one is not, meaning this would not match a cached result and it will continue to actually query the database.
I would argue that this is the expected SQL. I think the argument here is that encapsulating a single condition is pointless and interferes with caches. The fix would be to only encapsulate the condition if the condition array has more than one element in it.
I'm struggling to see a legitimate use case where you would routinely be making the same query, but passing your filter as an array only some of the time. Thanks for responding staudenmeir, hyperized. It's not about how you write your PHP statements, placing a orWhere before a where with or without arrays. I would vote for encapsulating all the timeessentially writing the following:. Both queries are valid SQL, but in the line of what Eloquent currently does, and that is encapsulating an array of parameters, I would vote for doing the same with separate parameters only.
Also, staudenmeirAs you said, the queries are "essentially the same", but not exactly the same.SQL Server - Pass multiple values to singe parameter in stored procedure pass integers
Well, in the stated use-case one could argue that they are the same. But, it shouldn't depend on how you pass your arguments to your method call, should it? Caroga If you use where in different ways multiple parameters vs. But I would argue that you can't expect the generated SQL to match exactly. If it can be done without a significant impact on performance, I don't see a strong argument against encapsulating everything.
I can imagine some people's tests would break if they're explicitly checking sql query strings, so I wouldn't submit the change on a point release. Then again, this might all just be going through a lot of unnecessary work for the sake of a presumably rare use case that could be solved by the developer just checking inputs.
This unified approach and generation of the query would suggest that it should process it the same way, eventually.
I would agree it should not be the same when passing multiple clauses with an array, e. Basically it just wraps your where statements. But I disagree that this is a rare use-case as query or model caching inside Laravel or outside is not a rare use-case. I don't think it's such a rare use-case, and a potential big win. So, closed, no final argument as to why, just closed? Great action.
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Also, could you share other ways of passing in large number of parameters into PreparedStatement? Then it works with all cases. This content has been marked as final. Show 8 replies. Also when you insert values into your temporary table the code naturally organizes itself into a loop.
The issue is this approach does not work in the WITH clause. If this works, my second wild guess is that you are using Oracle 9i : However, I don't know much Java but I have a feeling you have to do something to make your collection type known to the Java interface.They were disappointed and asked me how was this problem handled.
The short answer is that we use temporary tables or TVPs Table-valued parameters instead of arrays or we use other functions to replace the used of arrays.Aew dynamite season 1 episode 1
We created a table variable named myTableVariable and we inserted 3 rows and then we did a select in the table variable. Now, we will show information of the table Person. The results will display the names and information of the table Person. It is more efficient. You can use the id to retrieve values from a specific row. For example, for Roberto, the id is 1 for Dylan the id is 3 and for Gail the id is 2. In C for example if you want to list the second member of an array, you should run something like this:.
You use the brackets and the number 1 displays the second number of the array the first one is 0.
Spring - Passing Java Collection to IN SQL clause
In a table variable, you can use the id. The problem with table variables is that you need to insert values and it requires more code to have a simple table with few rows.How to undervolt gtx 1650
In C for example, to create an array, you only need to write the elements and you do not need to insert data into the table:. It is just a single line of code to have the array with elements. Can we do something similar in SQL Server? If you use the function in an old adventureworks database or in SQL Server or older, you may receive an error message.
The following example will try to split 3 names separated by commas:. If your compatibility level is lower thanuse this T-SQL sentence to change the compatibility level:. The following query will show the information of people in the person. The query will show information about the people with the names equal to Roberto or Gail or Dylan:.
The following code shows how retrieve the information. As you can see, to retrieve a value of a specific member of the fake array is not hard, but requires more code than a programming language that supports arrays.
There are many ways to solve this, but we will use the XML solution. The following example will show how to show the values that match the results of a fake vector:. In the first line, we just create a new fake array named oldfakearray and assign the names in the variable:.
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In the next line, we are removing the comma and creating a XML with the values of the oldfakearray:. Finally, we are doing a select from the table Person. Person in the Adventureworks database where the firstname is in the param variable:.
As you can see, SQL Server does not include arrays. If you do not have SQL Server, there were older methods to split strings separated by commas. We show the method using XML files. FROM [ Adventureworks ]. IN Select name from myTableVariable. FROM sys. FROM fakearray. Author Recent Posts. Daniel Calbimonte. He has worked for the government, oil companies, web sites, magazines and universities around the world.Oracle or SQL Serveryou should be careful with long IN lists, because they will probably trigger a hard parse every time you run them, as by the time you run the exact same predicate with elements in the list again, the execution plan will have been purged from the cache.
So, you cannot really profit from the cache. The question was about improving the speed of parsing a SQL statement. So the question is really:. Since our recent post about benchmarkingwe now know that we shall never guess, but always measure. Here are the values and the adapted query The IN list query now takes almost 2x as long but not quite 2xwhereas the array query now takes around 1. It looks as though arrays become the better choice when their size increases. With 32 bind variables in the IN list, or 32 array elements respectively:.
Still about the same. Get over here. Here are some benchmark results as always, not actual benchmark results, but anonymised units of measurement.
It looks like the default cardinality of the collection is assumed by the optimizer to be at least in my So probably full scan of actor with hash join. Indeed, the TABLE constructor in this case always seems to yield a constant cardinality estimate ofdespite the array containing much less data. So hinting approximate cardinalities might help here, to get nested loop joins for small arrays. But it has once again shown, that we must not optimise prematurely in SQL, but measure, measure, measure things.
So, the benefit of using the array is much more drastic when the content is big, as we can recycle execution plans much more often than with IN lists. In any case: Choose carefully when following advice that you find somewhere on the Internet. Also, when following this advice. I ran the benchmark on PostgreSQL 9.Garth Wells passed on another article to us. This one covers building a dynamic where clause.Airsoft gas magazine o rings
And the really neat part is that you don't actually need to write dynamic SQL. This is soooo much simpler.Hung spices co ltd
Let's look at an example that shows how this works. Assume you have a table called Customers created with the following statement. In other words, they want to be able to specify none, one, or more than one criteria and have the resultset filtered accordingly. Using dynamic SQL, the statements partial needed to create the query are shown here. The dynamic SQL approach will certainly work, but it has two downsides.
The first is that it is cumbersome to implement. Building SQL statements in this manner is an error-prone endeavor that takes a lot of time to get right. The second downside has to do with query performance speed. An execution plan is how the database engine actually retrieves the data from the database. When static SQL is used, execution plans can be re-used by different calls to the same statement. This results in faster query processing time because one less step is required to process the query.
This function returns the first non-null expression in its expression list. The following example shows how it works.
The following shows the modified statement. When a value is not supplied for a parameter, the current column value is used. A column value always equals itself, which causes all the rows to be returned for that operation.
The statement shown here creates a procedure that accepts the required parameters. When a parameter value is not supplied it is set to NULL. If record exist update partlevel from 1 to 0? Top 10, count Distinct of multiple columns in select statement 16h. How to insert data 22h. Grouping with condition and like with row over id in the sql 1d. Sql Stored Procedure Usage 1d. Help with linking two tables 1d.
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