init research

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# Microsoft SQL Server (MS SQL)
<web-summary>
Connect to Microsoft SQL Server using Kotlin DataFrame and JDBC — load structured data directly into your Kotlin workflow.
</web-summary>
<card-summary>
Use Kotlin DataFrame to read from Microsoft SQL Server — run queries or load entire tables via JDBC.
</card-summary>
<link-summary>
Fetch data from Microsoft SQL Server into Kotlin DataFrame using JDBC configuration.
</link-summary>
Kotlin DataFrame supports reading from [Microsoft SQL Server (MS SQL)](https://www.microsoft.com/en-us/sql-server)
database using JDBC.
Requires the [`dataframe-jdbc` module](Modules.md#dataframe-jdbc),
which is included by default in the general [`dataframe` artifact](Modules.md#dataframe-general)
and in [`%use dataframe`](SetupKotlinNotebook.md#integrate-kotlin-dataframe) for Kotlin Notebook.
Youll also need
[the official MS SQL JDBC driver](https://learn.microsoft.com/en-us/sql/connect/jdbc/download-microsoft-jdbc-driver-for-sql-server?view=sql-server-ver17):
<tabs>
<tab title="Gradle project">
```kotlin
dependencies {
implementation("com.microsoft.sqlserver:mssql-jdbc:$version")
}
```
</tab>
<tab title="Kotlin Notebook">
```kotlin
USE {
dependencies("com.microsoft.sqlserver:mssql-jdbc:$version")
}
```
</tab>
</tabs>
The actual Maven Central driver version could be found
[here](https://mvnrepository.com/artifact/com.microsoft.sqlserver/mssql-jdbc).
## Read
[`DataFrame`](DataFrame.md) can be loaded from a database in several ways:
a user can read data from a SQL table by given name ([`readSqlTable`](readSqlDatabases.md)),
as a result of a user-defined SQL query ([`readSqlQuery`](readSqlDatabases.md)),
or from a given `ResultSet` ([`readResultSet`](readSqlDatabases.md)).
It is also possible to load all data from non-system tables, each into a separate `DataFrame` ([`readAllSqlTables`](readSqlDatabases.md)).
See [](readSqlDatabases.md) for more details.
```kotlin
import org.jetbrains.kotlinx.dataframe.io.DbConnectionConfig
import org.jetbrains.kotlinx.dataframe.api.*
val url = "jdbc:sqlserver://localhost:1433;databaseName=testDatabase"
val username = "sa"
val password = "password"
val dbConfig = DbConnectionConfig(url, username, password)
val tableName = "Customer"
val df = DataFrame.readSqlTable(dbConfig, tableName)
```