private String buildConditions(String[] uniqueKeyFields) {
        return Arrays
                .stream(uniqueKeyFields)
                .map(col -> "T1." + quoteIdentifier(col) + "=T2." + quoteIdentifier(col))
                .collect(Collectors.joining(","));
    }
SqlServer merge data.
https://docs.microsoft.com/en-us/sql/t-sql/statements/merge-transact-sql?view=sql-server-ver15
inlong-sort/sort-flink/sort-flink-v1.13/sort-connectors/jdbc/src/main/java/org/apache/inlong/sort/jdbc/dialect/SqlServerDialect.java