SQL Create Table Syntax The syntax for the SQL create table statement is: CREATE[schema_name.]table_name(column_name data_type[NULL|NOTNULL][inline_constraint][DEFAULTdefault_value],...out_of_line_constraints); The parameters or values mentioned in this syntax are: schema_name This is the ...
SELECTFLOOR(number)FROMtable_nameWHEREcondition;SELECTCEILING(number)FROMtable_nameWHEREcondition; 其中,number为要取整的数,condition为筛选条件。例如,对students表中的age列进行向下取整: 代码语言:javascript 代码运行次数:0 运行 AI代码解释 SELECTFLOOR(age)FROMstudents; ROUND函数 ROUND函数用于对一个数进行四舍...
SELECTaggregated_column,[pivot_value_1],[pivot_value_2],...,[pivot_value_n]FROM(select...)ASsource_tablePIVOT(aggregate_function(column_for_aggregation)FORcolumn_for_pivotIN([pivot_value_1],[pivot_value_2],...,[pivot_value_n]))ASpivot_table; 其中,aggregated_column是基于哪个列进行聚合;...
内存优化 CREATE TABLE 语法: syntaxsql 复制 CREATE TABLE { database_name.schema_name.table_name | schema_name.table_name | table_name } ( { <column_definition> | [ <table_constraint> ] [ ,... n ] | [ <table_index> ] [ ,... n ] } [ PERIOD FOR SYSTEM_TIME ( system_start...
Create Table Example with Simple Syntax In the code block below, we have the basic syntax for creating a table with 3 columns: CREATE TABLE TableName( columnName1 TYPE, columnName2 TYPE, columnName3 TYPE ); GO Here is a simple break-down of the syntax: ...
importjava.sql.*;publicclassTableExistsExample{publicstaticvoidmain(String[]args){Stringurl="jdbc:mysql://localhost:3306/mydatabase";Stringusername="root";Stringpassword="password";try{Connectionconnection=DriverManager.getConnection(url,username,password);if(connection!=null){System.out.println("Connected...
您可以使用 FOR 子句來為查詢結果指定下列其中一個選項。 藉由指定 FOR BROWSE,在流覽模式數據指標中檢視查詢結果時允許更新。 藉由指定 FOR XML,將查詢結果格式化為 XML。 藉由指定 FOR JSON,將查詢結果格式化為 JSON。 Transact-SQL 語法慣例 語法 syntaxsql 複製 [ FOR { BROWSE | <XML> | <JS...
syntaxsql 複製 CREATE TABLE { database_name.schema_name.table_name | schema_name.table_name | table_name } ( { <column_definition> | [ <table_constraint> ] [ ,... n ] | [ <table_index> ] [ ,... n ] } [ PERIOD FOR SYSTEM_TIME ( system_start_time_column_name , system_...
syntaxsql复制 [FOR{BROWSE|<XML>|<JSON>} ]<XML>::=XML{ {RAW[ ('ElementName') ] |AUTO} [<CommonDirectivesForXML>[ , {XMLDATA|XMLSCHEMA[ ('TargetNameSpaceURI') ] } ] [ ,ELEMENTS[XSINIL|ABSENT] ] |EXPLICIT[<CommonDirectivesForXML>[ ,XMLDATA] ] |PATH[ ('ElementName') ] [<Com...
syntaxsql コピー -- Syntax for Azure Synapse Analytics and Parallel Data Warehouse ALTER TABLE { database_name.schema_name.source_table_name | schema_name.source_table_name | source_table_name } { ALTER COLUMN column_name { type_name [ ( precision [ , scale ] ) ] [ COLLATE Windows_...