Assume a table structure of MyTable(KEY, datafield1, datafield2...).
Often I want to either update an existing record, or insert a new record if it doesn’t exist.
Essentially:
IF (key exists) run update command ELSE run insert command
What’s the best performing way to write this?
Related Posts:
- Self Join to get employee manager name
- The ALTER TABLE statement conflicted with the FOREIGN KEY constraint
- The backend version is not supported to design database diagrams or tables
- “select * into table” Will it work for inserting data into existing table
- MySQL Error: : ‘Access denied for user ‘root’@’localhost’
- What is the difference between “INNER JOIN” and “OUTER JOIN”?
- What is the difference between “INNER JOIN” and “OUTER JOIN”?
- What is an MDF file? [closed]
- Selecting COUNT(*) with DISTINCT
- Case in Select Statement
- What is a stored procedure?
- ORA-00904: invalid identifier
- Inserting multiple rows in a single SQL query? [duplicate]
- Conversion failed when converting date and/or time from character string while inserting datetime
- How do I UPDATE from a SELECT in SQL Server?
- SQL query to select dates between two dates
- Conversion failed when converting date and/or time from character string while inserting datetime
- When should I use CROSS APPLY over INNER JOIN?
- Insert Data Into Temp Table with Query
- MySQL Error: : ‘Access denied for user ‘root’@’localhost’
- error, string or binary data would be truncated when trying to insert
- How to create Temp table with SELECT * INTO tempTable FROM CTE Query
- NOT IN vs NOT EXISTS
- How can I do an UPDATE statement with JOIN in SQL Server?
- Must declare the scalar variable
- Must declare the scalar variable
- Rename column SQL Server 2008
- Why do we need “Relationships” between tables at all?
- INSERT statement conflicted with the FOREIGN KEY constraint – SQL Server
- Efficiently convert rows to columns in sql server
- Nested select statement in SQL Server
- INSERT statement conflicted with the FOREIGN KEY constraint – SQL Server
- How do I escape a single quote in SQL Server?
- Case statement in MySQL
- T-SQL split string based on delimiter
- Drop a temporary table if it exists
- How do I escape a single quote in SQL Server?
- How Stuff and ‘For Xml Path’ work in SQL Server?
- IDENTITY_INSERT is set to OFF – How to turn it ON?
- Column name or number of supplied values does not match table definition
- Inserting data into a temporary table
- Can a foreign key be NULL and/or duplicate?
- Why does NULL = NULL evaluate to false in SQL server
- CREATE VIEW must be the only statement in the batch
- SQL Server FOR EACH Loop
- Difference between JOIN and INNER JOIN
- Best way to do nested case statement logic in SQL Server
- What is the difference between JOIN and UNION?
- Error Code: 2013. Lost connection to MySQL server during query
- The multi-part identifier could not be bound
- “CASE” statement within “WHERE” clause in SQL Server 2008
- Get day of week in SQL Server 2005/2008
- What is the difference between Scope_Identity(), Identity(), @@Identity, and Ident_Current()?
- incorrect syntax error CREATE VIEW must be the only statement in the batch
- SQLite – UPSERT *not* INSERT or REPLACE
- how to drop partition without dropping data in MySQL?
- DateTime2 vs DateTime in SQL Server
- Difference between numeric, float and decimal in SQL Server
- SQL Server Insert if not exists
- SQL Server: Invalid Column Name
- What is it exactly a BLOB in a DBMS context
- MySQL Error 1264: out of range value for column
- SQL Server reports ‘Invalid column name’, but the column is present and the query works through management studio
- How to parse XML data in SQL server table
- What is the equivalent of ‘describe table’ in SQL Server?
- SQL Server IF NOT EXISTS Usage?
- How do I query for all dates greater than a certain date in SQL Server?
- String or binary data would be truncated. The statement has been terminated
- Add a column with a default value to an existing table in SQL Server
- Error converting data type varchar to float
- Remote table-Valued Function Calls are not allowed
- How to concatenate text from multiple rows into a single text string in SQL Server
- Count(*) vs Count(1) – SQL Server
- I want to use CASE statement to update some records in sql server 2005
- Simulate CREATE DATABASE IF NOT EXISTS for PostgreSQL?
- Determine ROW that caused “unexpected end of file” error in BULK INSERT?
- Determine ROW that caused “unexpected end of file” error in BULK INSERT?
- Conversion failed when converting the varchar value ‘simple, ‘ to data type int
- SELECT DISTINCT on one column
- Exclude a column using SELECT * [except columnA] FROM tableA?
- Bulk load data conversion error (type mismatch or invalid character for the specified codepage) for row 1, column 4 (Year)
- Why is SQL server throwing this error: Cannot insert the value NULL into column ‘id’?
- TSQL PIVOT MULTIPLE COLUMNS
- Postgres Error: More than one row returned by a subquery used as an expression
- Microsoft OLE DB Provider for SQL Server error ‘80004005’
- Bulk load data conversion error (truncation)
- Insert into a MySQL table or update if exists
- How do I reset a sequence in Oracle?
- SQL “select where not in subquery” returns no results
- ListAGG in SQLSERVER
- Equivalent of Oracle’s RowID in SQL Server
- Is there a Max function in SQL Server that takes two values like Math.Max in .NET?
- Subtract one day from datetime
- MySQL equivalent of DECODE function in Oracle
- ‘CREATE PROCEDURE’ must be the only statement in the batch (Erro)
- what is the difference between triggers, assertions and checks (in database)
- Is it possible to specify condition in Count()?
- Replacing NULL with 0 in a SQL server query
- SQL Server dynamic PIVOT query?
- Incorrect syntax near ”