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https://docs.oracle.com/cd/B19306_01/server.102/b15658/app_odbc.htm
G.1 Features Not Supported. Oracle ODBC Driver does not support the following ODBC 3.0 features: Interval data types. SQL_C_UBIGINT and SQL_C_SBIGINT C data type identifiers. Shared connections. Shared environments. The SQL_LOGIN_TIMEOUT attribute …
https://docs.microsoft.com/en-us/sql/odbc/reference/develop-app/unicode-data
SQL_WCHAR data has a fixed string length, while SQL_WVARCHAR has a variable length with a declared maximum and SQL_WLONGVARCHAR has a variable length with a maximum that depends on the data source. The C Unicode type indicator is SQL_C_WCHAR. This is the default for each of the SQL Unicode type indicators. All of the SQL types can be converted ...
https://docs.oracle.com/en/database/oracle/oracle-database/19/adfns/odbc-driver.html
Force SQL_WCHAR Support - Check this box to enable SQLDescribeCol, SQLColumns, and SQLProcedureColumns to unconditionally return the data type of SQL_WCHAR for SQL_CHAR columns; SQL_WVARCHAR for SQL_VARCHAR columns; and SQL_WLONGVARCHAR for SQL_LONGVARCHAR columns. This feature enables Unicode support in applications that rely on …
https://docs.microsoft.com/en-us/sql/odbc/reference/appendixes/sql-data-types
A driver's support for SQL data types depends on the level of SQL-92 that the driver complies with. To determine the level of SQL-92 grammar supported by the driver, an application calls SQLGetInfo with the SQL_SQL_CONFORMANCE information type. Additionally, a given driver and data source may support additional, driver-specific SQL data types.
http://dev.toadfordataanalyst.com/webhelp/Content/Connection_Manager/Create_ODBC_Connections.htm
If you have an Oracle database with Unicode data, make sure to select Force SQL_WCHAR Support on the Workarounds tab of the windows Oracle ODBC Configuration dialog. If you do not, you will not be able to see the data. If creating a MySQL ODBC connection to use in a cross-connection query, you must specify a database in the Windows MySQL ODBC ...
https://docs.microsoft.com/en-us/sql/relational-databases/native-client/features/odbc-driver-behavior-change-when-handling-character-conversions
SQL Server Native Client ODBC Driver version Length or Indicator Outcome Description; SQL Server 2008 R2 Native Client or earlier: 20: SQLFetch reports that there is a truncation on the right side of the data. Length is the length of the data returned, not what was stored (assumes *2 CHAR to WCHAR conversion which can be incorrect for glyphs).
https://docs.microsoft.com/en-us/sql/relational-databases/native-client-odbc-api/sqlgetinfo
SQLGetInfo in SQL Server Native Client differs from SQLGetInfo in the SQL Server ODBC driver (SQLSRV32.DLL) when SQLGetInfo is called with SQL_KEYWORDS and a 0 buffer length. The SQL Server Native Client driver returns SQL_SUCCESS but the SQL Server ODBC driver returns SQL_SUCCESS_WITH_INFO.
https://docs.microsoft.com/en-us/sql/connect/oledb/features/utf-8-support-in-oledb-driver-for-sql-server
UTF-8 Support in OLE DB Driver for SQL Server. 12/12/2019; 4 minutes to read +1; In this article. APPLIES TO: SQL Server Azure SQL Database Azure Synapse Analytics (SQL DW) Parallel Data Warehouse Download OLE DB Driver. Microsoft OLE DB Driver for SQL Server (version 18.2.1) adds support for the UTF-8 server encoding.
https://www.mssqltips.com/sqlservertip/4322/sql-server-differences-of-char-nchar-varchar-and-nvarchar-data-types/
SQL Server differences of char, nchar, varchar and nvarchar data types. By: Sherlee Dizon Updated: ... Problem. The differences of SQL Server char, nchar, varchar and nvarchar are frequently discussed not just during interviews, but also by developers during discussions on database design. ... SQL Server doesn't support UTF-8 encoding for ...Author: Sherlee Dizon
https://docs.oracle.com/database/121/ADFNS/adfns_odbc.htm?ref=binfind.com/web
Force SQL_WCHAR Support - Check this box to enable SQLDescribeCol, SQLColumns, and SQLProcedureColumns to unconditionally return the data type of SQL_WCHAR for SQL_CHAR columns; SQL_WVARCHAR for SQL_VARCHAR columns; and SQL_WLONGVARCHAR for SQL_LONGVARCHAR columns. This feature enables Unicode support in applications that rely on …
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