add primary key to existing table sql

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showing results for - "add primary key to existing table sql"
Sabrina
27 Jan 2019
1alter table Persion add primary key (persionId,Pname,PMID)
2
Julianna
06 Jul 2020
1ALTER TABLE <Table_Name>
2DROP CONSTRAINT <constraint_name>
3
4ALTER TABLE <Table_Name>
5ADD CONSTRAINT <constraint_name> PRIMARY KEY (<Column1>,<Column2>)
Malachi
17 May 2017
1ALTER TABLE `tblauto`
2  ADD PRIMARY KEY (`id`);
3
4--
Darrell
17 May 2016
1ALTER TABLE Persons
2
3ADD PRIMARY KEY (ID); 
Jacinta
23 Feb 2016
1ALTER TABLE Production.TransactionHistoryArchive
2   ADD CONSTRAINT PK_TransactionHistoryArchive_TransactionID PRIMARY KEY CLUSTERED (TransactionID);
3
Kevin
25 Aug 2017
1-- NOTE: this is for SQL-Oracle specifically
2
3-- example:
4SELECT cols.table_name, cols.column_name, cols.position, cons.status, cons.owner
5FROM all_constraints cons, all_cons_columns cols
6WHERE cols.table_name = 'CUSTOMERS' 
7AND cons.constraint_type = 'P'
8AND cons.constraint_name = cols.constraint_name
9AND cons.owner = cols.owner;
10
11-- syntax:
12SELECT cols.table_name, cols.column_name, cols.position, cons.status, cons.owner
13FROM all_constraints cons, all_cons_columns cols
14WHERE cols.table_name = '<table-name>' -- Replace <table-name> with your table-name
15AND cons.constraint_type = 'P'
16AND cons.constraint_name = cols.constraint_name
17AND cons.owner = cols.owner;
18
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