AI代码解释 ---Table structureforgrade---DROPTABLEIFEXISTS`grade`;CREATETABLE`grade`(`id`int(11)NOTNULLAUTO_INCREMENTCOMMENT'id',`sno`varchar(20)CHARACTERSETutf8COLLATEutf8_unicode_ciNULLDEFAULTNULLCOMMENT'学号',`courseName`varchar(20)CHARACTERSETutf8COLLATEutf8_unicode_ciNULLDEFAULTNULLCOMMENT'课程...
=0; } }// Create a new user.publicoverrideManagementUserInfoCreateUser(stringuserName,stringpassword){// Test whether the username already exists.i 保存并编译项目。 步骤4:向 IIS 添加提供程序 确定提供程序的程序集信息: 在Windows 资源管理器中打开C:...
IF NOT EXISTS (SELECTnameFROMsys.databasesWHEREname= N'Library')CREATEDATABASELibrary; 此脚本将创建一个名为Library的新数据库(如果尚不存在)。 新Library数据库显示在数据库列表中。 如果没有立即看到它,请刷新对象资源管理器。 创建表 现在,在Authors数据库中创建Library表。
-- Skipping the column list, but keeping the values in order INSERT dbo.Products VALUES (75, 'Tire Bar', NULL, 'Tool for changing tires.') GO 只要在默认架构中访问和更改表,架构名称就是可选的。 由于 ProductDescription 列允许 Null 值,而且没有提供值,因此可以从语句中完全删除 ProductDescripti...
@Testpublic void testBatchInsert() {System.out.println("--- batch insert method test ---");List<User> list = new ArrayList<>();for (int i = 0; i < 10; i++) {User user = new User();user.setName("test");user.setAge(13);user.setEmail("101@qq.com");list.add(user);}us...
CREATE TABLE T1 ( column_1 int, column_2 varchar(30)); GO CREATE VIEW V1 AS SELECT column_2, column_1 FROM T1; GO INSERT INTO V1 VALUES ('Row 1',1); GO SELECT * FROM T1; GO SELECT * FROM V1; GO(2)UPDATE语句UPDATE...
create tableifnot existsdwd_category_by_day(`i_category`string,`cate_sales`double,`cayehory_day_order_cnt`bigint)partitionedby(`year`bigint,`day`bigint)TBLPROPERTIES('sink.partition-commit.policy.kind'='metastore,success-file');--创建源表settable.sql-dialect=default;create tableifnot existss...
'mutate_type', 'appendonly'); --day是分区列,要出现在视图的group by的条件中 CREATE MATERIALIZED VIEW mv_sales_p AS SELECT day, hour, avg(amount) AS amount_avg FROM base_sales_p GROUP BY day, hour; COMMIT; create table base_sales_20220101 partition of base_sales_p for values in('202...
PARTITION partition_name[VALUES {LESS THAN {(expr | value_list) | MAXVALUE} | IN (value_list)}][[STORAGE]ENGINE[=]engine_name][COMMENT [=]'string'][DATA DIRECTORY [=]'data_dir'][INDEX DIRECTORY [=]'index_dir'][MAX_ROWS [=]max_number_of_rows][MIN_ROWS [=]min_number_of_rows...
(4)) +'Sales'+/* Build a VALUES clause. */' VALUES (@InsOrderID, @InsCustID, @InsOrdDate,'+' @InsOrdMonth, @InsDelDate)';/* Set the value to use for the order month because functions are not allowed in the sp_executesql parameter list. */SET@OrderMonth =DATEPART(mm, @Prm...