SQL•SQL References

SQL DROP DEFAULT Keyword

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SQL DROP DEFAULT Keyword

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DROP DEFAULT Keyword

Drop Default

The DROP DEFAULT

command is used to delete a DEFAULT constraint. To drop a DEFAULT constraint, use the following SQL:

Formula

SQL Server / Oracle / MS Access:

ALTER TABLE Persons

ALTER COLUMN City DROP DEFAULT;

MySQL:

ALTER TABLE Persons

ALTER City DROP DEFAULT;

SQL DROP DEFAULT Keyword

Concept visual

SQL DROP DEFAULT Keyword

Pointer walk

two pointers

left=0

right=6

1

3

Start at both ends

DROP DEFAULT Keyword

Drop Default

The DROP DEFAULT

command is used to delete a DEFAULT constraint. To drop a DEFAULT constraint, use the following SQL:

Formula

SQL Server / Oracle / MS Access:

ALTER TABLE Persons

ALTER COLUMN City DROP DEFAULT;

MySQL:

ALTER TABLE Persons

ALTER City DROP DEFAULT;

SQL DROP DEFAULT Keyword

SQL DROP DEFAULT Keyword

DROP DEFAULT Keyword

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Drop Default

The DROP DEFAULT

ALTER TABLE Persons

MySQL:

ALTER TABLE Persons

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SQL DROP DEFAULT Keyword

SQL DROP DEFAULT Keyword

DROP DEFAULT Keyword

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Drop Default

The DROP DEFAULT

ALTER TABLE Persons

MySQL:

ALTER TABLE Persons

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