CREATE TABLE TestBatch (ColA INT PRIMARY KEY, ColB CHAR(3)); GO INSERT INTO TestBatch VALUES (1, 'aaa'); INSERT INTO TestBatch VALUES (2, 'bbb'); INSERT INTO TestBatch VALUES (1, 'ccc'); -- Duplicate key error. GO SELECT * FROM TestBatch; -- Returns rows 1 and 2...
insert into t_primary1(id, c1) values (1, 100); insert into t_primary1(id, c1) values (1, 200); SQL 错误 [1062] [23000]: Duplicate entry '1' for key 't_primary1.PRIMARY' 外键约束 外键约束用于建立两个关系表之间的参照引用,通常是一个表中的字段引用另一个表中的主键字段。例如,员工...
1.11、去重的方式 1.12、条件判断类型 二、高级查询 2.1、基础查询 2.2、 条件查询 2.3、范围查...
ROW_NUMBER WF enumerates the rows. We can also use it to remove duplicate records with it. Or to take a random sample. As the name suggests WF can calculate statistics on a given window: 代码语言:javascript 代码运行次数:0 运行 AI代码解释 sum(sales)OVER(PARTITIONBYCustomerIDBYtsROWSBETWEEN...
sql注入检查更加严格,修复/sys/duplicate/check存在sql注入漏洞 #4129 master· v3.8.0v3.4.3last 1 parent d34614c commit f18ced5 File tree jeecg-boot-base-core/src/main/java/org/jeecg/common/util SqlInjectionUtil.java1 file changed +34 -7lines changedDiff for: jeecg-boot-base-core/src...
'DUPLICATE', 'DYNAMIC', 'EACH', 'ELSE', 'ELSEIF', 'ENABLE', 'ENCLOSED', 'ENCRYPTION', 'END', 'ENDS', 'ENGINE', 'ENGINES', 'ENUM', 'ERROR', 'ERRORS', 'ESCAPE', 'ESCAPED', 'EVENT', 'EVENTS', 'EVERY', 'EXCHANGE', 'EXECUTE', 'EXISTS', 'EXIT', 'EXPANSION', 'EXPIRE', '...
DELTA_VIOLATE_CONSTRAINT_WITH_VALUES 23502 插入或更新值為 Null,但數據行不能包含 Null 值。 DELTA_MISSING_NOT_NULL_COLUMN_VALUE,DELTA_NOT_NULL_CONSTRAINT_VIOLATED 23505 發生唯一索引或唯一條件約束所加之條件約束的違規。 DUPLICATED_MAP_KEY,DUPLICATE_KEY 23512 無法加入檢查條件約束,因為數據表包含的數據...
报错:Update row with Key (id)=(xxxx) multiple times或者duplicate key value violates unique constraint 问题原因:违反唯一性约束,执行UPDATE、INSERT ON CONFLICT或INSERT操作时,主键存在重复数据。 解决方法: 若INSERT语法报错:可以改为INSERT INTO xx ON CONFLICT的语法,实现主键去重,详情请参见INSERT ON CONFLIC...
When a unique index exists, the Database Engine checks for duplicate values each time data is added or modified. Operations that would generate duplicate key values are rolled back, and the Database Engine returns an error message. This is true even if the data addition or modification operatio...
**说明:1. on duplicate key update 含义:1)如果在INSERT语句末尾指定了 on duplicate key update, 并且插入行后会导致在一个UNIQUE索引或PRIMARY KEY中出现重复值, 则在出现重复值的行执行UPDATE;2)如果不会导致唯一值列重复的问题,则插入新行。2. values(col_name)函数只是取当前插入语句中的插入值,并没有...