7 lines
181 B
SQL
7 lines
181 B
SQL
CREATE TABLE t(a, b, c);
|
|
INSERT INTO t VALUES (1,'a',1.25),(2,'b',-3.5),(3,'c',0.0);
|
|
|
|
ALTER TABLE t RENAME COLUMN c TO c_new;
|
|
INSERT INTO t SELECT * FROM t;
|
|
|
|
SELECT COUNT(*) FROM t; |