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SQLite supports a limited subset of ALTER TABLE. The ALTER TABLE command in SQLite allows the user to rename a table or to add a new column to an existing table. It is not possible to rename a column, remove a column, or add or remove constraints from a table.
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BEGIN TRANSACTION;
CREATE TEMPORARY TABLE temp_table(a);
INSERT INTO temp_table SELECT a from ±í;
DROP TABLE ±í;
CREATE TABLE ±í(a);
INSERT INTO ±í SELECT a from temp_table;
DROP TABLE temp_table;
COMMIT;
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