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Batch extract EXCEL files from Oracle BLOB column
Run DBBlobEditor, login to Oracle.
Click “Start New Task – Export LOB To Files” at task dialog.
then show the wizard.
1. Configure “BLOB to EXCEL” settings.
2. Bulk export Oracle BLOB to EXCEL files.
then you can see exporting EXCEL files
More about Oracle BLOB exporter
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Oracle → EXCEL reference
Type mapping
| Value kind | in Oracle | in EXCEL |
|---|---|---|
| Int | NUMBER(10) | 1234 (a real numeric cell) |
| Bigint | NUMBER(19) | 9007199254740993 (exact only while the cell stays text) |
| Decimal | NUMBER(p,s) | 1234.56 (numeric cell, format controls the displayed decimals) |
| Float | BINARY_DOUBLE | 1.234E+10 (numeric cell) |
| Text | VARCHAR2(n) | text cell; leading zeros survive only if the column is text |
| Long text | CLOB | text cell; wraps inside the cell rather than the row |
| Date | DATE | a serial number plus a date cell format |
| Datetime | TIMESTAMP | a serial number plus a date-time cell format |
| Binary | BLOB | not representable as data |
| Boolean | NUMBER(1) | TRUE / FALSE (a real boolean cell) |
| JSON | CLOB | a text cell; the quotes are part of the value |
Dialect differences
Oracle is a database server and EXCEL is a file format, so the gap is wider than a dialect difference – the rows below are where values and structure stop lining up.
| Property | in Oracle | in EXCEL |
|---|---|---|
| port | 1521 | — |
| identifiers | "double quotes" | Not applicable; a cell holds exactly one value |
| row limit | FETCH FIRST n ROWS ONLY | — |
| dates | DATE, TIMESTAMP | Stored as a serial number; only the cell format makes it lo... |
| long text | CLOB, NCLOB | — |
| binary | BLOB, BFILE | Only as text or an embedded object, not as a data column |
| separator | — | Cells, not delimiters |
| encoding | — | UTF-8 internally, declared in the package |
| typing | — | Real cell types: text, number, date, boolean, error |
| shape | Tables of rows and columns | Multiple sheets, each a flat grid |
| ceiling | — | 1,048,576 rows x 16,384 columns per sheet; 255 sheets per w... |
Command line
| Side | Command |
|---|---|
| Oracle | exp / expdp |
| Oracle (load) | sqlldr (SQL*Loader) |
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