Changing the increment used by auto-increment in a SQL query PostgreSQL 1CREATE SEQUENCE sequencename2start 23increment 2;4 Copy Code Then insert this sequence into your main table: 1INSERT INTO TableName2(Column1, Column2, Column3, Column4)3VALUES4(nextval('sequencename'), 'Value1', 'Val...
mysql>CREATETABLEINSECT->(->idINTUNSIGNEDNOTNULLAUTO_INCREMENT,->PRIMARYKEY(id),->nameVARCHAR(30)NOTNULL,#typeofinsect->dateDATENOTNULL,#datecollected->originVARCHAR(30)NOTNULL#wherecollected);QueryOK,0rowsaffected(0.02sec)mysql>INSERTINTOINSECT(id,name,date,origin)VALUES->(NULL,'housefly','20...
--1、开启一个事务(root@localhost)[test]>begin;QueryOK,0rowsaffected(0.00sec)(root@localhost)[test]>insert intot1(c2)values('aa');QueryOK,1rowaffected(0.00sec)(root@localhost)[test]>select*from t1;+---+---+|c1|c2|+---+---+|1|aa|+---+---+1rowinset(0.00sec)(root@localhost)...
6 rows in set (0.00 sec) 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 现在再建立一个表,表示每个省份的简称 mysql> create table province(id int unsigned primary key auto_increment not null,name varchar(40) not null, proabb varchar(4) not null); Query OK, 0 ro...
mysql_query ("insert into insect (name,date,origin)values('moth','2001-09-14','windowsill')", $conn_id);$seq = mysql_insert_id ($conn_id); 4. 对现有序列重新编号 在某些情况下,您已经从表中删除了很多记录,并且想要对所有记录重新编号,此时可以使用一个简单的技巧:先删除 auto_increment 字段...
PHP 通过 mysql_insert_id() 函数来获取执行的插入 SQL 语句中 AUTO_INCREMENT 列的值。 mysql_query("INSERT INTO insect (name,date,origin) VALUES('moth','2001-09-14','windowsill')",$conn_id);$seq=mysql_insert_id($conn_id); 重置序列 ...
The problem here is, we have no way of controlling ouridfield. When a new record is inserted, we not only must manually enter a value forid, but we have to perform a query ahead of time to attempt to verify thatidvalue doesn’t already exist (a near-impossibility when dealing with ...
ERROR 1064 (42000): You have an errorinyour SQL syntax; check the manual that corresponds to your MySQL server versionforthe right syntax to use near''at line 1 mysql> ALTER TABLE T_CLASS CHANGE CLASSSNO classno int; Query OK, 0 rows affected (0.01 sec) ...
MySQL [test2023]> REPLACE INTO test_autoincrement (name,uid) values('张三丰',1001); Query OK, 2 rows affected (0.01 sec)这里通过REPLACE INTO操作判断,如果存在唯一ID为1001的记录,那么将name字段的值更改为"张三丰",可发现此时影响的行数是2。现在我们再次查看主从节点表的autoincrement值。
Please execute below query in SQL to create a table with AUTOINCREMENT keyword. CREATE TABLE student (Student_ID intAUTOINCREMENT, Student_name varchar(255), City varchar(255), Marks int); Now, a new table called “student” is created and the field “Student_ID” is an auto increment fi...