Can a foreign key be NULL and/or duplicate? Can a foreign key be NULL and/or duplicate? oracle oracle
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Can a foreign key be NULL and/or duplicate?
sql
sql-server
oracle
foreign-keys
lien
oracle
Is there a combination of "LIKE" and "IN" in SQL?
sql
sql-server
oracle
tsql
plsql
lien
oracle
How do I list all the columns in a table?
sql
mysql
sql-server
database
oracle
lien
oracle
What resources exist for Database performance-tuning? [closed]
mysql
sql-server
database
oracle
postgresql
lien
oracle
update columns values with column of another table based on condition [duplicate]
sql
mysql
sql-server
oracle
lien
oracle
What is the Oracle equivalent of SQL Server's IsNull() function?
sql-server
oracle
tsql
plsql
lien
oracle
Oracle: is there a tool to trace queries, like Profiler for sql server? [closed]
sql-server
oracle
profiler
lien
oracle
How can I get the number of records affected by a stored procedure?
sql
sql-server
oracle
tsql
plsql
lien
oracle
MySQL vs. SQL Server vs. Oracle [closed]
mysql
sql-server
oracle
lien
oracle
Relationship between catalog, schema, user, and database instance
mysql
sql-server
oracle
postgresql
db2
lien
oracle
Online SQL syntax checker conforming to multiple databases [closed]
mysql
sql-server
oracle
postgresql
lien
oracle
What is the equivalent of the Oracle "Dual" table in MS SqlServer?
sql-server
oracle
dual-table
lien
oracle
The order of a SQL Select statement without Order By clause
sql-server
oracle
select
sql-order-by
lien
oracle
What's the SQL national character (NCHAR) datatype really for?
sql
sql-server
oracle
tsql
nvarchar
lien
oracle
SQL - How to store and navigate hierarchies?
sql
sql-server
oracle
database-design
hierarchy
lien
oracle
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