通过调用hg_create_table_like,系统会根据select_query结果的schema创建一个表名为new_table_name的表,但不会插入任何数据。 参数说明 new_table_name:要创建表的表名(不支持创建外部表),只支持固定字符串,不支持字符拼接或函数生成等。 select_query:查询的SQL语句串。当SQL中的内容完全为select * from tablenam...
The SQL statement “create table <table_name> as select …” is used to create a normal or temporary table and materialize the result of the select. Some applications use this construct to create a copy of the table. This is one statement that will do all the work, so you do not need...
Chances are you've had to make a copy of database data for some reason or another. When you need to do this, you probably import the data to a new table or make a copy of the table from the Tables view. However, you can also use the SQL SELECT INTO statement.Anonymous...
[as] query_expression 根据一个查询结果集,创建一个包含这些数据的新表。 CREATETABLEnew_tblASSELECT*FROMorig_tbl; IGNORE | REPLACE 这两个选项表明,当根据select语句创建表时,该如何处理复制唯一键值的行。(how to handle rows that duplicate unique key values when copying a table using a SELECT stateme...
You can also use a VALUES statement in the SELECT part of CREATE TABLE ... SELECT; the VALUES portion of the statement must include a table alias using an AS clause. To name the columns coming from VALUES, supply column aliases with the table alias; otherwise, the default column names co...
Convert the select query to a make table query, choose a location for the new table, and then run the query to create the table. Do not confuse a make table query with an update or append query. You use an update query when you need to add or change data in individual fields. You...
In Postgres, theCREATE TABLE ASstatement allows us to create a table from an existing one. It creates the table based on the result-set retrieved by the SELECT query. Follow the below syntax to avail the functionality of the Postgres’CREATE TABLE ASstatement: ...
Query_Expression Provides the query expression that defines the schema of the data and provides the initial data values. AnyU-SQL query expressioncan be used to create a table, includingSELECT,EXTRACT,PRODUCE, invocation of a TVF etc..
CREATE TABLE AS SELECT in Azure Synapse Analytics and Microsoft Fabric creates a new table based on the output of a SELECT statement. CTAS is the simplest and fastest way to create a copy of a table.
3. CREATE TABLE … SELECT is not supported when using GTID-based replication 4. Metadata locks won’t release until the statement is finished 与此同时,这种语句存在许多问题: 1. 您不为新表创建索引 2. 您在一个事务中混合了事务性和非事务性语句时,与任何DDL一样,它将提交当前和未完成的事务 ...