ORACLE
select * from all_users;
Modificar una tabla (ALTER TABLE)
SQL SERVER
CREATE TABLE dbo.doc_exy (column_a INT ) ; GO INSERT INTO dbo.doc_exy (column_a) VALUES (10) ; GO ALTER TABLE dbo.doc_exy ALTER COLUMN column_a DECIMAL (5, 2) ; GO DROP TABLE dbo.doc_exy ; GO
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