How to create an index in Firebird 2?
CREATE INDEX Firebird Documentation Index→ Firebird 2.0 Language Ref. Update→ DDL statements→ CREATE INDEX CREATE INDEX UNIQUEindices now allow NULLs Indexing on expressions Maximum index key length increased Maximum number of indices per table increased Available in: DSQL, ESQL
When to use DESC to sort in Firebird?
DESC sorts the values from highest to lowest and must be specified if a descending index is wanted. A descending index may prove useful for queries that are likely to search for high values (oldest age, most recent, biggest, etc.) and for any ordered searches or outputs that will specify a descending sort order.
Is there maximum number of indices per table in Firebird?
Description: The maximum number of 65 indices per table has been removed in Firebird 1.0.3, reintroduced at the higher level of 257 in Firebird 1.5, and removed once again in Firebird 2.0.
When to use a descending index in a database?
A descending index may prove useful for queries that are likely to search for high values (oldest age, most recent, biggest, etc.) and for any ordered searches or outputs that will specify a descending sort order. The following definition creates a descending index on a table in the employee database:
How to create a table in FIREBIRD script?
CREATE TABLE MYTABLE ( MYCOLUMN VARCHAR (14) NOT NULL ); The very first time I run this (when the table does not already exist) the table is created as expected. If I run the script again I get the following error:
Why is my table deleted in FIREBIRD script?
If I run the script again I get the following error: When the script exits, MYTABLE has been deleted and can no longer be found in the database. If I run the script a third time the table is once again created and no errors are thrown. Why can’t the script both delete and then recreate a table?