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How to add a column of another data from another column?
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DB2_COLUMNS(3) 1 DB2_COLUMNS(3) db2_columns - Returns a result set listing the columns and associated metadata for a table SYNOPSIS
resource db2_columns (resource $connection, [string $qualifier], [string $schema], [string $table-name], [string $column-name]) DESCRIPTION
Returns a result set listing the columns and associated metadata for a table. PARAMETERS
o $connection - A valid connection to an IBM DB2, Cloudscape, or Apache Derby database. o $qualifier - A qualifier for DB2 databases running on OS/390 or z/OS servers. For other databases, pass NULL or an empty string. o $schema - The schema which contains the tables. To match all schemas, pass '%'. o $table-name - The name of the table or view. To match all tables in the database, pass NULL or an empty string. o $column-name - The name of the column. To match all columns in the table, pass NULL or an empty string. RETURN VALUES
Returns a statement resource with a result set containing rows describing the columns matching the specified parameters. The rows are com- posed of the following columns: +------------------+---------------------------------------------------+ | Column name | | | | | | | Description | | | | +------------------+---------------------------------------------------+ | TABLE_CAT | | | | | | | Name of the catalog. The value is NULL if this | | | table does not have catalogs. | | | | | TABLE_SCHEM | | | | | | | Name of the schema. | | | | | TABLE_NAME | | | | | | | Name of the table or view. | | | | | COLUMN_NAME | | | | | | | Name of the column. | | | | | DATA_TYPE | | | | | | | The SQL data type for the column represented as | | | an integer value. | | | | | TYPE_NAME | | | | | | | A string representing the data type for the col- | | | umn. | | | | | COLUMN_SIZE | | | | | | | An integer value representing the size of the | | | column. | | | | | BUFFER_LENGTH | | | | | | | Maximum number of bytes necessary to store data | | | from this column. | | | | | DECIMAL_DIGITS | | | | | | | The scale of the column, or NULL where scale is | | | not applicable. | | | | | NUM_PREC_RADIX | | | | | | | An integer value of either 10 (representing an | | | exact numeric data type), 2 (representing an | | | approximate numeric data type), or NULL (repre- | | | senting a data type for which radix is not appli- | | | cable). | | | | | NULLABLE | | | | | | | An integer value representing whether the column | | | is nullable or not. | | | | | REMARKS | | | | | | | Description of the column. | | | | | COLUMN_DEF | | | | | | | Default value for the column. | | | | | SQL_DATA_TYPE | | | | | | | An integer value representing the size of the | | | column. | | | | |SQL_DATETIME_SUB | | | | | | | Returns an integer value representing a datetime | | | subtype code, or NULL for SQL data types to which | | | this does not apply. | | | | |CHAR_OCTET_LENGTH | | | | | | | Maximum length in octets for a character data | | | type column, which matches COLUMN_SIZE for sin- | | | gle-byte character set data, or NULL for non- | | | character data types. | | | | |ORDINAL_POSITION | | | | | | | The 1-indexed position of the column in the ta- | | | ble. | | | | | IS_NULLABLE | | | | | | | A string value where 'YES' means that the column | | | is nullable and 'NO' means that the column is not | | | nullable. | | | | +------------------+---------------------------------------------------+ SEE ALSO
db2_column_privileges(3), db2_foreign_keys(3), db2_primary_keys(3), db2_procedure_columns(3), db2_procedures(3), db2_special_columns(3), db2_statistics(3), db2_table_privileges(3), db2_tables(3). PHP Documentation Group DB2_COLUMNS(3)
