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我試圖用sqlite3做出SQLite數據庫的轉儲的下降：sqlite3的：轉儲與表
sqlite3 example.sq3 .dump > backup.sql
這是一個例子輸出：
PRAGMA foreign_keys=OFF;
BEGIN TRANSACTION;
CREATE TABLE IF NOT EXISTS "articles" (
"id" INTEGER PRIMARY KEY AUTOINCREMENT,
"author_id" INTEGER,
"title" VARCHAR,
"body" TEXT,
"published" VARCHAR(1) DEFAULT 'N'
);
INSERT INTO "articles" VALUES(1,1,'First Article','First Article Body','Y');
INSERT INTO "articles" VALUES(2,3,'Second Article','Second Article Body','Y');
INSERT INTO "articles" VALUES(3,1,'Third Article','Third Article Body','Y');
CREATE TABLE IF NOT EXISTS "comments" (
"id" INTEGER PRIMARY KEY AUTOINCREMENT,
"article_id" INTEGER NOT NULL,
"user_id" INTEGER NOT NULL,
"comment" TEXT,
"published" VARCHAR(1) DEFAULT 'N',
"created" DATETIME,
"updated" DATETIME
);
INSERT INTO "comments" VALUES(1,1,2,'First Comment for First Article','Y','2007-03-18 10:45:23','2007-03-18 10:47:31');
INSERT INTO "comments" VALUES(2,1,4,'Second Comment for First Article','Y','2007-03-18 10:47:23','2007-03-18 10:49:31');
INSERT INTO "comments" VALUES(3,1,1,'Third Comment for First Article','Y','2007-03-18 10:49:23','2007-03-18 10:51:31');
INSERT INTO "comments" VALUES(4,1,1,'Fourth Comment for First Article','N','2007-03-18 10:51:23','2007-03-18 10:53:31');
INSERT INTO "comments" VALUES(5,2,1,'First Comment for Second Article','Y','2007-03-18 10:53:23','2007-03-18 10:55:31');
INSERT INTO "comments" VALUES(6,2,2,'Second Comment for Second Article','Y','2007-03-18 10:55:23','2007-03-18 10:57:31');
DELETE FROM sqlite_sequence;
INSERT INTO "sqlite_sequence" VALUES('articles',3);
INSERT INTO "sqlite_sequence" VALUES('comments',6);
COMMIT;
我的問題是表格方案的轉儲始終使用語句CREATE TABLE IF NOT EXISTS，而我想刪除現有表，因爲當我導入轉儲時，我無法物理擦除具有相同現有表的現有數據庫d記錄。
我檢查了sqlite3命令選項，但是我發現沒有用處。
我該怎麼辦？