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8.1

Single SQL Query limit on Multiple-Row INSERT

Asked by richardneililagan in MS SQL Server, Databases Miscellaneous, SQL Query Syntax

Tags: SQL, MSSQL

Hello!

My current project sort of requires a mechanism to perform a multiple-row-INSERT on an MS SQL Server. Thing is, we really don't have the luxury of performing it on BULK INSERT or BCP, etc.

Now, I'm pretty sure that we can do the following instead (correct me if I'm wrong) :

(code snippet)

While this is clearly less than par as compared to the "proper" alternatives, we really have to make do with that, sadly.

But in reality, though, we're actually talking about around 7000-8000 INSERT statements here, and we're looking into consolidating all that into a single query such as that on the code snippet.

My question is, on a scale that big, would it be advisable to bulk that all into one query? Or would it still be better to "package" the queries into smaller, bite-size numbers? If so, about how many INSERTS should we consolidate into a single query (ball park figure is good).

Things to note though: we're talking about 25 fields per INSERT, but all are INT types.

Thanks in advance!

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             //### from this :
 
INSERT INTO MyTable (A,B,C) VALUES (1,2,3);
INSERT INTO MyTable (A,B,C) VALUES (4,5,6);
INSERT INTO MyTable (A,B,C) VALUES (7,8,9);
 
//### to this :
 
INSERT INTO MyTable (A,B,C)
SELECT 1,2,3
UNION ALL SELECT 4,5,6
UNION ALL SELECT 7,8,9;

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Single SQL Query limit on Multiple-Row INSERT

Asked by richardneililagan in MS SQL Server, Databases Miscellaneous, SQL Query Syntax

Tags: SQL, MSSQL

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