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I'm using the following code:
SELECT * FROM table
WHERE Col IN (123,123,222,....)
However, if I put more than ~3000 numbers in the IN clause, SQL throws an error.
Does anyone know if there's a size limit or anything similar?!!
Depending on the database engine you are using, there can be limits on the length of an instruction.
SQL Server has a very large limit:
http://msdn.microsoft.com/en-us/library/ms143432.aspx
ORACLE has a very easy to reach limit on the other side.
So, for large IN clauses, it's better to create a temp table, insert the values and do a JOIN. It works faster also.
There is a limit, but you can split your values into separate blocks of in()
Select *
From table
Where Col IN (123,123,222,....)
or Col IN (456,878,888,....)
Parameterize the query and pass the ids in using a Table Valued Parameter.
For example, define the following type:
CREATE TYPE IdTable AS TABLE (Id INT NOT NULL PRIMARY KEY)
Along with the following stored procedure:
CREATE PROCEDURE sp__Procedure_Name
#OrderIDs IdTable READONLY,
AS
SELECT *
FROM table
WHERE Col IN (SELECT Id FROM #OrderIDs)
Why not do a where IN a sub-select...
Pre-query into a temp table or something...
CREATE TABLE SomeTempTable AS
SELECT YourColumn
FROM SomeTable
WHERE UserPickedMultipleRecordsFromSomeListOrSomething
then...
SELECT * FROM OtherTable
WHERE YourColumn IN ( SELECT YourColumn FROM SomeTempTable )
Depending on your version, use a table valued parameter in 2008, or some approach described here:
Arrays and Lists in SQL Server 2005
For MS SQL 2016, passing ints into the in, it looks like it can handle close to 38,000 records.
select * from user where userId in (1,2,3,etc)
I solved this by simply using ranges
WHERE Col >= 123 AND Col <= 10000
then removed unwanted records in the specified range by looping in the application code. It worked well for me because I was looping the record anyway and ignoring couple of thousand records didn't make any difference.
Of course, this is not a universal solution but it could work for situation if most values within min and max are required.
You did not specify the database engine in question; in Oracle, an option is to use tuples like this:
SELECT * FROM table
WHERE (Col, 1) IN ((123,1),(123,1),(222,1),....)
This ugly hack only works in Oracle SQL, see https://asktom.oracle.com/pls/asktom/asktom.search?tag=limit-and-conversion-very-long-in-list-where-x-in#9538075800346844400
However, a much better option is to use stored procedures and pass the values as an array.
You can use tuples like this:
SELECT * FROM table
WHERE (Col, 1) IN ((123,1),(123,1),(222,1),....)
There are no restrictions on number of these. It compares pairs.
I am a newbie in Oracle SQL, though I have experience in SQL Server.
In SQL Server, to select the rows from a table with a particular column in front:
select columnName,* from tableName
In Oracle:
select columnName,* from tableName
gives error ORA-00936: missing expression, as below:
Please guide.
I can't view images, but here's what I think you need:
select t.column_name, t.*
from table_name t
i.e. you should prefix that particular column name with a table alias ("t"), and then use the same alias with the asterisk ("t.*") to retrieve all table columns.
In Oracle, if you need to view a column but also all columns, you need to define an alias for the table.
Select columnName, A.*
from tableName A;
few things we need to keep it in mind
Alias name in sql - used to derive the individual column name via select query
When you are going to use *[select all] you don't have to worry about the alias name
But when you try to pull all the columns and some specific fields you want to filter then you should go for "Alias"
Alias its object key to refer the inter column
select stu.studentName,stu.* from student stu;
I'm using the following code:
SELECT * FROM table
WHERE Col IN (123,123,222,....)
However, if I put more than ~3000 numbers in the IN clause, SQL throws an error.
Does anyone know if there's a size limit or anything similar?!!
Depending on the database engine you are using, there can be limits on the length of an instruction.
SQL Server has a very large limit:
http://msdn.microsoft.com/en-us/library/ms143432.aspx
ORACLE has a very easy to reach limit on the other side.
So, for large IN clauses, it's better to create a temp table, insert the values and do a JOIN. It works faster also.
There is a limit, but you can split your values into separate blocks of in()
Select *
From table
Where Col IN (123,123,222,....)
or Col IN (456,878,888,....)
Parameterize the query and pass the ids in using a Table Valued Parameter.
For example, define the following type:
CREATE TYPE IdTable AS TABLE (Id INT NOT NULL PRIMARY KEY)
Along with the following stored procedure:
CREATE PROCEDURE sp__Procedure_Name
#OrderIDs IdTable READONLY,
AS
SELECT *
FROM table
WHERE Col IN (SELECT Id FROM #OrderIDs)
Why not do a where IN a sub-select...
Pre-query into a temp table or something...
CREATE TABLE SomeTempTable AS
SELECT YourColumn
FROM SomeTable
WHERE UserPickedMultipleRecordsFromSomeListOrSomething
then...
SELECT * FROM OtherTable
WHERE YourColumn IN ( SELECT YourColumn FROM SomeTempTable )
Depending on your version, use a table valued parameter in 2008, or some approach described here:
Arrays and Lists in SQL Server 2005
For MS SQL 2016, passing ints into the in, it looks like it can handle close to 38,000 records.
select * from user where userId in (1,2,3,etc)
I solved this by simply using ranges
WHERE Col >= 123 AND Col <= 10000
then removed unwanted records in the specified range by looping in the application code. It worked well for me because I was looping the record anyway and ignoring couple of thousand records didn't make any difference.
Of course, this is not a universal solution but it could work for situation if most values within min and max are required.
You did not specify the database engine in question; in Oracle, an option is to use tuples like this:
SELECT * FROM table
WHERE (Col, 1) IN ((123,1),(123,1),(222,1),....)
This ugly hack only works in Oracle SQL, see https://asktom.oracle.com/pls/asktom/asktom.search?tag=limit-and-conversion-very-long-in-list-where-x-in#9538075800346844400
However, a much better option is to use stored procedures and pass the values as an array.
You can use tuples like this:
SELECT * FROM table
WHERE (Col, 1) IN ((123,1),(123,1),(222,1),....)
There are no restrictions on number of these. It compares pairs.
hi in my database i am store more than 50 field with primarykey (Auto increment) i am not sure about the fields name but i wants to select the entire data in that table , i am using
SELECT * FROM tablename
i want to select all the fields except that ID but this query populate the entire table so is there is possible to unselect the particular field in the select query. Can anyone have an idea please guide me. Thanks in Advance
The * indicates that you want to select ALL fields from a given table. If you want to select only a few fields, or all but one, then you will need to specify the ones you want manually:
select field1,field2,field3 from tablename
The SQL standard does not offer an "except" notation. It would be neat if we could
select t.* -t.ID
from some_table t
/
but it is not supported.
On the other hand, SELECT * is a dangerous construct. It is always better to explicitly list the columns we want in any given situation.
I'm using the following code:
SELECT * FROM table
WHERE Col IN (123,123,222,....)
However, if I put more than ~3000 numbers in the IN clause, SQL throws an error.
Does anyone know if there's a size limit or anything similar?!!
Depending on the database engine you are using, there can be limits on the length of an instruction.
SQL Server has a very large limit:
http://msdn.microsoft.com/en-us/library/ms143432.aspx
ORACLE has a very easy to reach limit on the other side.
So, for large IN clauses, it's better to create a temp table, insert the values and do a JOIN. It works faster also.
There is a limit, but you can split your values into separate blocks of in()
Select *
From table
Where Col IN (123,123,222,....)
or Col IN (456,878,888,....)
Parameterize the query and pass the ids in using a Table Valued Parameter.
For example, define the following type:
CREATE TYPE IdTable AS TABLE (Id INT NOT NULL PRIMARY KEY)
Along with the following stored procedure:
CREATE PROCEDURE sp__Procedure_Name
#OrderIDs IdTable READONLY,
AS
SELECT *
FROM table
WHERE Col IN (SELECT Id FROM #OrderIDs)
Why not do a where IN a sub-select...
Pre-query into a temp table or something...
CREATE TABLE SomeTempTable AS
SELECT YourColumn
FROM SomeTable
WHERE UserPickedMultipleRecordsFromSomeListOrSomething
then...
SELECT * FROM OtherTable
WHERE YourColumn IN ( SELECT YourColumn FROM SomeTempTable )
Depending on your version, use a table valued parameter in 2008, or some approach described here:
Arrays and Lists in SQL Server 2005
For MS SQL 2016, passing ints into the in, it looks like it can handle close to 38,000 records.
select * from user where userId in (1,2,3,etc)
I solved this by simply using ranges
WHERE Col >= 123 AND Col <= 10000
then removed unwanted records in the specified range by looping in the application code. It worked well for me because I was looping the record anyway and ignoring couple of thousand records didn't make any difference.
Of course, this is not a universal solution but it could work for situation if most values within min and max are required.
You did not specify the database engine in question; in Oracle, an option is to use tuples like this:
SELECT * FROM table
WHERE (Col, 1) IN ((123,1),(123,1),(222,1),....)
This ugly hack only works in Oracle SQL, see https://asktom.oracle.com/pls/asktom/asktom.search?tag=limit-and-conversion-very-long-in-list-where-x-in#9538075800346844400
However, a much better option is to use stored procedures and pass the values as an array.
You can use tuples like this:
SELECT * FROM table
WHERE (Col, 1) IN ((123,1),(123,1),(222,1),....)
There are no restrictions on number of these. It compares pairs.