What are the restrictions to use long data type in SQL?
LONG and LONG RAW columns cannot be used in distributed SQL statements and cannot be replicated. If a table has both LONG and LOB columns, then you cannot bind more than 4000 bytes of data to both the LONG and LOB columns in the same SQL statement.
What is maximum length of VARCHAR2 in Oracle?
4000 bytes
A.1 Datatype Limits
| Datatypes | Limit | Comments |
|---|---|---|
| VARCHAR | Maximum size: 4000 bytes | None |
| VARCHAR2 | Maximum size: 4000 bytes, or 32767 bytes if the MAX_STRING_SIZE initialization parameter is set to EXTENDED See Also: “MAX_STRING_SIZE” initialization parameter for additional details | None |
What is long VARCHAR?
The LONG VARCHAR type allows storage of character strings with a maximum length of 32,700 characters. It is identical to VARCHAR, except that you cannot specify a maximum length when creating columns of this type.
What are the restrictions of the long datatype in Oracle?
The Oracle documentation describes the LONG datatype’s main restrictions as follows: A table can contain only one LONG column. You cannot create an object type with a LONG attribute. LONG columns cannot appear in WHERE clauses or in integrity constraints (except that they can appear in NULL and NOT NULL constraints). LONG columns cannot be indexed.
Why can’t I use a column with a long datatype?
As others have already pointed out, a column having LONG datatype can not be used like “where lower (text) like ” so you need to change the column datatype.
What is long data type in SQL?
LONG data is text data that is to be appropriately converted when moving among different systems. LONG datatype columns are used in the data dictionary to store the text of view definitions. You can use LONG columns in SELECT lists, SET clauses of UPDATE statements, and VALUES clauses of INSERT statements. LONG Restrictions vs LOB
What is long raw data type in Oracle?
These datatypes are intended for binary data and byte strings. For example, LONG RAW can store graphics, sound, documents, and arrays of binary data; the interpretation is dependent on the use. Oracle Net and the Export and Import utilities do not perform character conversion when transmitting RAW or LONG RAW data.
