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SQL Server's process command BULK INSERT to load data from a user-specified file format into database tables. Specified file format can accept any cavalcade & row terminator, for instance – pipe, infinite & comma. Furthermore, this tech-recipes mail demonstrates how to import CSV files using Majority INSERT in SQL Server.

To enumerate other ways to load CSV files into SQL Server are using Import/Consign wizard and SSIS.

Following is the basic syntax and related arguments to consider while loading data using BULK INSERT into SQL Server. Under this mail service, we are covering of import Majority INSERT properties to become started. If you like to get in advance, you may refer to SQL Server BOL documentation.

BULK INSERT – SQL Server – Syntax

Majority            INSERT            <Tabular array            Name>            FROM            <File Proper noun>            WITH            (         [CHECK_CONSTRAINTS]         [FIRSTROW]         [KEEPIDENTITY] 	[KEEPNULLS] 	[Lodge] 	[FORMAT] 	[ROWTERMINATOR] 	[FIELDTERMINATOR]     )            Go          

Post-obit the to a higher place syntax, we will demonstrate the BULK INSERT with various examples to understand how different properties work.

1.

Importing Simple CSV file using Majority INSERT

The following data will be loaded into dbo.Employee tabular array using BULK INSERT. Nosotros practice not have to specify whatever other properties because the data is in the right CSV format. Merely specifying FORMAT='CSV' will import the information into tabular array.

CSV File Data

E100,Atul,100,IT E101,Chetan,200,60 minutes E102,Niraj,300,Legal E103,Vishal,400,HR E104,Sangram,500,Leadership E105,Shailesh,600,Legal          

Bulk Insert Query

            Drop            TABLE            IF            EXISTS            dbo.Employee;            CREATE            Tabular array            dbo.Employee (  EmployeeId      VARCHAR(100) ,Name            VARCHAR(255)            Zippo            ,Salary          INT             ,Dept            VARCHAR(100)            Cypher            );            TRUNCATE            TABLE            dbo.Employee;  Bulk            INSERT            dbo.Employee            FROM            'D:\EmployeeDetails.csv'            WITH            (FORMAT='CSV');            SELECT            *            FROM            dbo.Employee;          

2.

Importing Data with FIELDTERMINATOR & ROWTERMINATOR using Bulk INSERT

In the following text file we have pipe { | } every bit FIELDTERMINATORand comma { ; } as ROWTERMINATOR. Specifying these properties with Bulk INSERT will import the data into the Employee tabular array.

CSV File Data

E100|Atul|100|It; E101|Chetan|200|Hr; E102|Niraj|300|Legal; E103|Vishal|400|Hour; E104|Sangram|500|Leadership; E105|Shailesh|600|Legal;          

Bulk Insert Query

            TRUNCATE            Table            dbo.Employee;  Bulk            INSERT            dbo.Employee            FROM            'D:\EmployeeDetails.csv'            WITH            (         FIELDTERMINATOR =            '|'            ,ROWTERMINATOR   =            ';'            );            SELECT            *            FROM            dbo.Employee;          

3.

Importing Data with KEEPNULLS & KEEPIDENTITY using Majority INSERT

We have modified the text file information & tabular array structure to demonstrate this case. Added identity column as a master key in the employee table so BULK INSERT should consider the values provided in the file for the IDENTITY column. KEEPIDENTITY prevents SQL Server from generating its own values and forces to consider from the file while importing.

KEEPNULLS property will insert NULL for employee proper noun if not specified like for employee E104 in the following file. Ingoing KEEPNULLS belongings will add a blank value.

CSV File Information

1|E100|Atul|100|Information technology; ii|E101|Chetan|200|HR; 3|E102|Niraj|300|Legal; 6|E103|Vishal|400|HR; 7|E104||500|Leadership; 8|E105|Shailesh|600|Legal;          

Majority Insert Query

            DROP            Table            IF            EXISTS            dbo.Employee;            CREATE            Table            dbo.Employee (  SerialNo        INT            IDENTITY(ane,1) ,EmployeeId      VARCHAR(100) ,Proper name            VARCHAR(255)            Nil            ,Salary          INT             ,Dept            VARCHAR(100)            Cipher            );  Majority            INSERT            dbo.Employee            FROM            'D:\EmployeeDetails.csv'            WITH            (         FIELDTERMINATOR =            '|'            ,ROWTERMINATOR   =            ';'            ,KEEPNULLS        ,KEEPIDENTITY      );            SELECT            *            FROM            dbo.Employee;          

iv.

Importing Data with CHECK_CONSTRAINTS using BULK INSERT

Considering nosotros have a bank check constraint at table level on the Bacon cavalcade to permit only positive values which are greater than zero. If we do not specify CHECK_CONSTRAINTS option with Bulk INSERT so negative values coming from the file will be ignored and inserted into the table. If nosotros want to force and validate all the constraints while doing Bulk INSERT to maintain data consistency and then information technology is necessary to specify CHECK_CONSTRAINTS pick.

CSV File Data

1|E100|Atul|100|Information technology; two|E101|Chetan|200|Hr; iii|E102|Niraj|300|Legal; 6|E103|Vishal|400|HR; 7|E104|Sangram|500|Leadership; 8|E105|Shailesh|-500|Legal;          

Bulk Insert Query

            DROP            TABLE            IF            EXISTS            dbo.Employee;            CREATE            TABLE            dbo.Employee (  SerialNo        INT            IDENTITY(1,1) ,EmployeeId      VARCHAR(100) ,Proper name            VARCHAR(255)            NULL            ,Salary          INT            Bank check            (Salary > 0) ,Dept            VARCHAR(100)            NULL            );            TRUNCATE            Table            dbo.Employee;  BULK            INSERT            dbo.Employee            FROM            'D:\EmployeeDetails.csv'            WITH            (         FIELDTERMINATOR =            '|'            ,ROWTERMINATOR   =            ';'            ,KEEPNULLS        ,KEEPIDENTITY            ,CHECK_CONSTRAINTS      );          

Following error is generated while importing a negative value into the table with CHECK_CONSTRAINTS option enabled.

Msg 547, Level 16, Land 0, Line 12
The INSERT statement conflicted with the CHECK constraint "CK__Employee__Salary__5812160E". The disharmonize occurred in database "PracticeDB", tabular array "dbo.Employee", column 'Salary'.
The statement has been terminated.

five.

Importing Data with FIRST ROW using BULK INSERT

FIRST ROW property volition skip the specified number minus One number of rows and insert all the rows post-obit. In the subsequent text file, we have vi total rows. Specifying FIRST ROW=3 volition start importing at 3rd row (E102) – skipping the first two rows.

CSV File Data

ane|E100|Atul|100|It; 2|E101|Chetan|200|Hr; 3|E102|Niraj|300|Legal; 6|E103|Vishal|400|HR; 7|E104|Sangram|500|Leadership; 8|E105|Shailesh|500|Legal;          

Bulk Insert Query

            Driblet            Tabular array            IF            EXISTS            dbo.Employee;            CREATE            Table            dbo.Employee (  SerialNo        INT            IDENTITY(1,1) ,EmployeeId      VARCHAR(100) ,Proper name            VARCHAR(255)            NULL            ,Bacon          INT            Bank check            (Salary > 0) ,Dept            VARCHAR(100)            Goose egg            );            TRUNCATE            Tabular array            dbo.Employee;  Bulk            INSERT            dbo.Employee            FROM            'D:\EmployeeDetails.csv'            WITH            (         FIELDTERMINATOR =            '|'            ,ROWTERMINATOR   =            ';'            ,KEEPNULLS        ,KEEPIDENTITY            ,CHECK_CONSTRAINTS        ,FIRSTROW=3      );            SELECT            *            FROM            dbo.Employee;          

Summary

In a nutshell, we have leanred the use of Bulk INSERT process in SQL Server. Without using any other tool we can easily import data from CSV and other delimited file using SQL Server. Along with helpful backdrop we tin import circuitous data post-obit the options to maintain data consistency. If y'all like this mail yous may browse through Tech-Recipes SQL Server Database archive to heighten your knowledge.

Read more and browse through more posts related to SQL Server on Tech-Recipes.

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iii. SSIS- How To Export & Import ISPAC File SSISDB – Visual Studio
iv. How To Create Database Diagram In SQL Server SSMS
v. How To Index Computed Column In SQL Server
half-dozen. How To Utilize Computed Column In SQL Server
7. Execute SQL Files Using SQLCMD

Source: https://www.tech-recipes.com/database/how-to-import-csv-file-using-bulk-insert-in-sql-server/

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