sql PRIMARY KEY constraints violated, not insert duplicate key in a subject - Code World

sql PRIMARY KEY constraints violated, not insert duplicate key in a subject

Others 2019-09-01 17:21:14 views: null

The data show that you there are duplicate records

two cases

1 and tables existing between the repeated data to be imported

at this time can be an association between two tables, a primary key to identify duplicates cascade

2. To import table there are duplicate records

may be similar to the following statement by duplicate records in a table to find out

select StudentCode from StudentScore group by StudentCode [PRIMARY KEY field here] having count (*)> 1

records and delete duplicate by finishing on it

Guess you like

Origin www.cnblogs.com/kelly1314/p/11442202.html

sql PRIMARY KEY constraints violated, not insert duplicate key in a subject

insert into on duplicate key update

INSERT ... ON DUPLICATE KEY UPDATE

INSERT ON DUPLICATE KEY UPDATE

INSERT ON DUPLICATE KEY UPDATE

Mysql primary key constraints and unique constraints

Duplicate entry ‘XXX‘ for key ‘PRIMARY‘

FOREIGN KEY foreign key constraints; UNIQUE and PRIMARY KEY primary key constraints, the use of CREATE INDEX to build indexes

insert on duplicate key mysql update

MySQL insert returns primary key

sql primary key and unique key and foreign key

sql - primary key

When solving MYSQL batch insert, UUID_SHORT appeared 1062 -Duplicate entry 'xxx' for key 'PRIMARY'

MYSQL disable primary foreign key constraints

8. increment primary key insert designated primary data key

[23000][1062] Duplicate entry ‘6‘ for key ‘PRIMARY‘

03|Oracle learning (primary key constraints, joint primary keys)

SQL / establish a database / foreign key primary key &

MySQL- insert update ON DUPLICATE KEY UPDATE

MySQL_INSERT UPDATE ON DUPLICATE KEY UPDATE

MySQL INSERT or UPDATE ON DUPLICATE KEY UPDATE

MySQL -- the use of ON DUPLICATE KEY UPDATE in INSERT

java HashMap insert duplicate Key value problem

mysql insert or update ON DUPLICATE KEY UPDATE

MyBatis insert returns to increment primary key

mybatis insert is to return the primary key id

MYSQL insert data primary key id is not continuous

mybatis insert operation returns the primary key

MySQL database constraints (not null, unique, default, primary key, foreign key constraints)

MySQL is not on Insert, there will Update. INSERT ... ON DUPLICATE KEY UPDATE Syntax

Recommended

Ranking

ElasticSearch-- data modeling best practices

Permission Maintenance - Shadow User Backdoor

Refactor the code using MVP mode

Quantitative investment-fundamental model-PVC multi-factor model

Spark Big Data Processing Lecture Notes 3.2 Mastering RDD Operators

Blazor page components (2)

Erlernen von Kenntnissen zur Android-Entwicklung – Kodierung, Verschlüsselung, Hash, Serialisierung und Zeichensätze

About Qi high in JAVA study notes SORM summary detailed personal explanation

Will you calculate the accuracy of the rope displacement sensor in the measurement?

OPENJTAG debugging learning (3): debugging using the gdb command line

Daily

More

2024-05-01(4)

2024-04-30(36)

2024-04-29(5)

2024-04-28(12)

2024-04-27(29)

2024-04-26(22)

2024-04-25(32)

2024-04-24(30)

2024-04-23(30)

2024-04-22(5)