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END IF; --不存在,所以尝试插入key,如果其他人同时插入相同的key,可能得到唯一key失败。 BEGIN INSERT INTO db(a,b) VALUES (key, data); RETURN;
PRIMARY KEY (`job_sche_id`) ) ENGINE=InnoDB AUTO_INCREMENT=219 DEFAULT CHARSET=utf8; 输出示例 1 2 3 4 5 6 7 8 9 CREATE TABLE "public"."job_instance"
TABLE good_5 ( column_1 INTEGER NOT NULL PRIMARY KEY ,column_2 INTEGER ,column_3 INTEGER NOT
CLOUD_SDK_SK in the local environment String ak = System.getenv("CLOUD_SDK_AK"); String sk = System.getenv("CLOUD_SDK_SK");
输入示例 1 2 3 4 5 6 CREATE TABLE IF NOT EXISTS `public`.`runoob_dataType_test` ( `id` INT PRIMARY KEY AUTO_INCREMENT, `name` VARCHAR(128) NOT NULL
current_timestamp on update current_timestamp , clustered key clustered_key(shopid ASC, datetype ASC) )index_ALL = 'Y'; DROP TABLE IF EXISTS
4 --Seq Scan on public.t2 Output: t2.b Distribute Key: t2.a 5 --Index Scan using t1_b_idx on public.t1 Output:
PRIMARY KEY(`dataType1`) ) comment='表的注释'; ALTER TABLE `public`.`runoob_alter_test` COMMENT '修改后的表的注释'; ALTER TABLE `public`.`runoob_alter_test`
PRIMARY KEY(`dataType1`) ); ALTER TABLE runoob_alter_test PASSWORD 'HELLO'; 输出示例 1 2 3 4 5 6 7 8 9 10 CREATE TABLE "public"."runoob_alter_test"
current_timestamp on update current_timestamp , clustered key clustered_key(shopid ASC, datetype ASC) )BLOCK_SIZE = 1024 index_ALL = 'y';
IF EXISTS "public"."categories"; CREATE TABLE IF NOT EXISTS "public"."categories" ( "categoryid" SMALLSERIAL NOT NULL PRIMARY KEY, "categoryname"
CLOUD_SDK_SK in the local environment String ak = System.getenv("CLOUD_SDK_AK"); String sk = System.getenv("CLOUD_SDK_SK");
t1(dist_key int PRIMARY KEY, a int, b int); INSERT INTO t1 VALUES(1,2,3) ON CONFLICT(dist_key) DO UPDATE SET dist_key = EXCLUDED.dist_key, a = EXCLUDED
他统计信息时要采样的索引页数。DSC迁移时会将该属性删除。 输入示例 1 2 3 4 5 6 7 8 9 CREATE TABLE `public`.`runoob_alter_test`( `dataType1` int NOT NULL AUTO_INCREMENT,
DISTRIBUTOR_ID VARCHAR , BUYER_ID VARCHAR , DATE_TYPE BIGINT , PRIMARY KEY (SHOP_ID,DISTRIBUTOR_ID,DATE_TYPE,BUYER_ID) ) DISTRIBUTE BY HASH(SHOP_ID
t1(dist_key int PRIMARY KEY, a int, b int); INSERT INTO t1 VALUES(1,2,3) ON CONFLICT(dist_key) DO UPDATE SET dist_key = EXCLUDED.dist_key, a = EXCLUDED
在MySQL中,MAX_ROWS表示在表中存储的最大行数。DSC迁移过程时会将该属性删除。 输入示例 1 2 3 4 5 6 7 8 9 CREATE TABLE `public`.`runoob_alter_test`( `dataType1` int NOT NULL AUTO_INCREMENT,
MIN_ROWS表示在表中存储的最小行数。DSC迁移过程时会将该属性删除。 输入示例 1 2 3 4 5 6 7 8 CREATE TABLE `public`.`runoob_alter_test`( `dataType1` int NOT NULL AUTO_INCREMENT,
输入:CREATE VOLATILE TABLE AS WITH DATA(session_mode=Teradata) 如果源表具有PRIMARY KEY(主键)或UNIQUE CONSTRAINT(唯一约束),则该表不包含任何重复记录。在这种情况下,不需要添加MINUS操作符删除重复的记录。
sh -ak <Access_Key_Id> -sk <Secret_Access_Key> -obs_location obs.cn-north-1.myhuaweicloud.com 系统显示以下信息表示设置成功: setup successfully! <Access_Ke