SQL CREATE TABLE 实例现在我们想要创建一个名为 "Persons" 的表,包含五列:PersonID、LastName、FirstName、Address 和 City。我们使用下面的 CREATE TABLE 语句:实例 CREATE TABLE Persons ( PersonID int, LastName varchar(255), FirstName varchar(255), Address varchar(255), City varchar(255) ); ...
您可以使用Ignite的SQL语法来创建表,例如: CREATE TABLE Person ( id INT, name VARCHAR, age INT, PRIMARY KEY (id) ); 在这个例子中,我们创建了一个名为Person的表,包含id、name和age三个列。id列被定义为INT类型,name列被定义为VARCHAR类型,age列被定义为INT类型。PRIMARY KEY关键字用于指定id...
接下来,我们可以通过JsonNode对象的方法来访问和处理JSON数据的各个部分。 转换成CREATE TABLE语句 接下来,我们将展示如何将JSON数据转换成CREATE TABLE语句。假设我们要将上述JSON数据转换成如下的CREATE TABLE语句: CREATETABLEperson(idINT,nameVARCHAR(255),ageINT,hobbiesVARCHAR(255),streetVARCHAR(255),cityVARCHAR(...
CREATE TABLE Person ( ID INTEGER PRIMARY KEY, name VARCHAR(100), email VARCHAR(100) ) AS NODE; B. 创建 EDGE 表下面的示例演示如何创建 EDGE 表SQL 复制 CREATE TABLE friends ( id INTEGER PRIMARY KEY, start_date DATe ) AS EDGE; SQL...
SQL CREATE TABLE Example The following example creates a table called "Persons" that contains five columns: PersonID, LastName, FirstName, Address, and City: ExampleGet your own SQL Server CREATETABLEPersons ( PersonID int, LastName varchar(255), ...
CREATETABLEPerson (IDINTEGERPRIMARYKEY,nameVARCHAR(100), emailVARCHAR(100) )ASNODE; B. 创建EDGE表 下面的示例演示如何创建EDGE表 SQL CREATETABLEfriends (idINTEGERPRIMARYKEY, start_dateDATe)ASEDGE; SQL -- Create a likes edge table, this table does not have any user defined attributesCREATETABLEli...
obclient>CREATETABLEtbl10(col1INTPRIMARYKEY,col2INT)PARALLEL3;Query OK,0rowsaffected 使用函数定义列的默认值。 obclient>CREATESEQUENCE SEQ_PERSONIPTVSEQSTARTWITH1MINVALUE1MAXVALUE10INCREMENTBY2NOCYCLE NOORDER CACHE30;Query OK,0rowsaffected obclient>SELECTLPAD(SEQ_PERSONIPTVSEQ.NEXTVAL,18,TO_CHAR(SYSD...
CREATETABLEPersons ( PersonID int, LastName varchar(255), FirstName varchar(255), Address varchar(255), City varchar(255) ); The PersonID column is of type int and will hold an integer. The LastName, FirstName, Address, and City columns are of type varchar and will hold characters, an...
obclient> CREATE TABLE tbl10(col1 INT PRIMARY KEY, col2 INT) PARALLEL 3; Query OK, 0 rows affected 使用函数定义列的默认值。 obclient> CREATE SEQUENCE SEQ_PERSONIPTVSEQ START WITH 1 MINVALUE 1 MAXVALUE 10 INCREMENT BY 2 NOCYCLE NOORDER CACHE 30; Query OK, 0 rows affected obclient> ...