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SQL programmingYou can use the HCL OneDB™ implementation of the SQL language to develop applications for HCL OneDB™ database servers.
Guide to SQL: SyntaxThe HCL OneDB™ Guide to SQL: Syntax describes the syntax of the statements, data types, expressions, operators, and built-in functions of the HCL OneDB™ dialect of the SQL language.
Data types and expressionsThese topics describe the data types and expressions that HCL OneDB™supports.
Expression
Column ExpressionsA column expression specifies a data value in a column in the database, or a substring of the value, or a field within a ROW-type column, or a field in a BSON column.
Using Dot Notation

Using Dot Notation

Dot notation (sometimes called the membership operator) qualifies an SQL identifier with another SQL identifier of which it is a component. You separate the identifiers with the period (.) symbol.

Column projections qualify a column name with the following SQL identifiers:

Table name: table_name.column_name
View name: view_name.column_name
Synonym name: syn_name.column_name

Field projections directly access fields in a ROW column: column_name.field_name.

Field projections directly access fields in a ROW or a BSON column: column_name.field_name. BSON documents can have a hierarchical structure. You can specify multiple fields and positions in arrays, each separated by a period. A field name or array position must be preceded by all its ancestor field names.

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