sybase字段属性，identity，设置跳跃值，手工插入自增初始值

使用sybase时将id字段设置为identity属性，即为自增。 但是sybase中自增时有时会跳跃，即，上一条还是5，下一条可能一下跳到50000+了。 with identity_gap = 1 on 'default'可以设置跳跃值为1。 set identity_insert test_table on 手工插入identity的值 1000 再插入一条id就是1001 create table test_table ( id                              numeric(18,0)                    identity , str1                            varchar(20)                      not null   ) lock allpages with identity_gap = 1 on 'default' go set identity_insert test_table on go insert into test_table(id,str1) values(1000,'bbb') go set identity_insert test_table off go set identity_update test_table on go update test_table set id=id+1000 where id<1000 go set identity_update test_table off go insert into test_table(str1) values('ccc') ------------------------------------------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------------------------------------------ 让表中则增字段从1000开始自增，跳跃度为1 create table test_table ( id                              numeric(18,0)                    identity , str1                            varchar(20)                      not null , PRIMARY KEY CLUSTERED ( id ) on 'default' ) lock allpages with identity_gap = 1 on 'default' go setuser go set identity_insert test_table on go insert into test_table(id,str1) values(1000,'111') go set identity_insert test_table off go delete from test_table go 创建表的时候，设置 identity_gap = 1跳跃度为1 建表后打开identity手动开关，插入一条数据（id=1000），关