How can I perform large batch insertion into a SQL Server database?

Several methods can be used in SQL Server to perform bulk data insertion.

1. By using the INSERT INTO statement, multiple values can be inserted into the database within one INSERT INTO statement. For example:

INSERT INTO table_name (column1, column2, column3)
VALUES (value1, value2, value3),
       (value4, value5, value6),
       (value7, value8, value9);

1. We can use the BULK INSERT statement to perform bulk insert by reading data from an external file. For example:

BULK INSERT table_name
FROM 'C:\path\to\file.csv'
WITH (FIELDTERMINATOR = ',', ROWTERMINATOR = '\n');

1. By utilizing SQL Server Integration Services (SSIS), users can create data flow tasks and packages to facilitate large-scale data importing.
2. Utilizing temporary tables or table variables: Data can be first stored in temporary tables or table variables, and then inserted into the target table using the INSERT INTO statement.

No matter which method is used, the most suitable method for bulk writing into the database can be chosen based on specific needs and data volume.