AI代码解释 ---Table structureforstudent---DROPTABLEIFEXISTS`student`;CREATETABLE`student`(`id`int(11)NOTNULLAUTO_INCREMENTCOMMENT'id',`sno`varchar(20)CHARACTERSETutf8COLLATEutf8_unicode_ciNULLDEFAULTNULLCOMMENT'学号',`sname`varchar(10)CHARACTERSETutf8COLLATEutf8_unicode_ciNULLDEFAULTNULLCOMMENT'学生...
statement.values.ValuesStatement; import net.sf.jsqlparser.util.TablesNamesFinder; import org.apache.commons.collections.CollectionUtils; import sun.net.www.content.text.plain; import java.util.List; import java.util.Objects; public class Main { static String sql1 = "select t1.f1,t1.f2,t2.id...
-- Skipping the column list, but keeping the values in orderINSERTdbo.ProductsVALUES(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ProductDescription列的名称和值。
('hello', '1', 2); he -- Downcasting of a BIGINT to an INT > SELECT substring('hello', 1L, 2); he -- Crosscasting from STRING to INTEGER > SELECT substring('hello', str, 2) FROM VALUES(CAST('1' AS STRING)) AS T(str); he -- Crosscasting from INTEGER to STRING > ...
CREATETABLEsales_data ( product_id INT, sale_time TIMESTAMP, amount DECIMAL(12,2) ) PARTITION BY RANGE (sale_time) ( PARTITION p2023q1 VALUES LESS THAN ('2023-04-01'), PARTITION p2023q2 VALUES LESS THAN ('2023-07-01') );
创建数据库：CREATE DATABASE db_name;删除数据库：DROP DATABASE IF EXISTS db_name;创建和删除表：创建表：CREATE TABLE table_name ;删除表：DROP TABLE table_name;添加数据：语法：INSERT INTO 表名 [] VALUES ;查询数据：查询所有数据：SELECT * FROM table_name;查询指定字段的数据：SELECT ...
Create Rows out of NothingThe values keyword is probably as old as SQL itself and is pretty well-known for its use with the insert statement. This is, however, just the functionality required by entry-level SQL-92. With full SQL-92,0 values has a richer semantic: it becomes valid wherev...
postgres=# CREATE TABLE t_native_range_default PARTITION OF t_native_range DEFAULT; CREATE TABLE postgres=# insert into t_native_range values(1,'2016-09-01',1); INSERT01 list 分区表 表格通过明确的键值进行分区。 创建主分区 postgres=# create table t_native_list(f1 bigserial not null,f2 ...
'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...
mysql> CREATE TABLE sales -> (sale_id INT NOT NULL, -> cust_id INT NOT NULL, -> store_id INT NOT NULL, -> sale_date DATE NOT NULL, -> amount DECIMAL(9,2) -> ) -> PARTITION BY RANGE (yearweek(sale_date)) -> SUBPARTITION BY HASH (cust_id) -> (PARTITION s1 VALUES LESS ...