SELECTcolumn1,column2,column3,...INTOnewtable[INexternaldb]FROMoldtableWHEREcondition; 新表将按照在旧表中定义的列名和类型创建。您可以使用AS子句创建新的列名。 SQL SELECT INTO 示例 以下SQL 语句创建Customers的备份副本: 代码语言:sql AI代码解释 S
INTOnewtable [INexternaldb] FROMoldtable WHEREcondition; 只复制一些列到新表中: SELECTcolumn1, column2, column3, ... INTOnewtable [INexternaldb] FROMoldtable WHEREcondition; 新表将按照在旧表中定义的列名和类型创建。您可以使用AS子句创建新的列名。 SQL SELECT INTO 示例 以下SQL 语句创建Customers的...
table_references 是 目标表信息,可以是表名或者SELECT语句,格式为table_name | select_statement。更多信息,请参见目标表信息(table_references)。 join_expr 否 JOIN表达式,用于使用Join功能,格式为table_references join_type table_references [ ON join_condition | USING ( join_column [, ...] ) ]。当要...
SELECT[DISTINCT]{*|{column[,column...}[FROMtable_name][WHERE...][ORDERBYcolumn[ASC|DESC],...]LIMIT... 注意:mysql不区分大小写,我这里是在命令行敲打的,大多数直接就干脆写成一行了,为了方便观察单词,采用小写。具体使用包包按照要求就行。 基本查询 1、全列查询 语法:select * from 表名 2、指定...
Step 1: Open the workbook containing the Pivot Table you want to edit in Excel. Step 2:Click on any cell within the PivotTable to activate it. Step 3:Click once to select the entire column of data within the pivot table. Note that this will select only the data under that header with...
Hologres V0.10版本开始,支持使用CREATE TABLE LIKE语句复制表结构和表属性(主键、索引等),但需要执行以下命令设置GUC。开启GUC后,CREATE TABLE LIKE只支持通过SELECT * FROM <table_name>复制表,不支持其他写法,如SELECT <column_1>, <column_2> FROM <table_name>。 set hg_experimental_enable_create_table_li...
When I set selectionMode="multiple" on a column I get a checkbox in the table's header. It is used for selecting all rows. I noticed that if the table is paginated and there is more than one page, selecting all rows only selects the ones...
SELECT DISTINCT column FROM table_name_name DISTINCT关键字去除的是SELECT子句查询的列的重复信息。如果SELECT子句查询的列为多列,那么只有这些列的信息同时重复的记录才被去除。实例3 查询BookInfo表中所有的图书名称(去除重复值)本实例将查询BookInfo表中存在的所有图书的名称,即查询bookname列的数据,且去除重复的...
SELECT column1, column2, column3, ... INTO newtable [IN externaldb] FROM oldtable WHERE condition; 新表将按照在旧表中定义的列名和类型创建。您可以使用 AS 子句创建新的列名。 SQL SELECT INTO 示例 以下SQL 语句创建 Customers 的备份副本: SELECT * INTO CustomersBackup2017 FROM Customers; 以下...
SELECT, columns named only in the CREATE TABLE part come first. Columns named in both parts or only in the SELECT part come after that. The data type of SELECT columns can be overridden by also specifying the column in the CREATE TABLE part. ...