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symphonious    
a. 和音的,和谐的,调和的

和音的,和谐的,调和的

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  • sql - How can a LEFT OUTER JOIN return more records than exist in the . . .
    LEFT OUTER JOIN just like INNER JOIN (normal join) will return as many results for each row in left table as many matches it finds in the right table Hence you can have a lot of results - up to N x M, where N is number of rows in left table and M is number of rows in right table
  • How can the LEFT JOIN return more results than the unjoined query?
    Each row in the first table may match more than one row in the second table You can check this with: SELECT l id,count(*) FROM list l LEFT JOIN cardinal c ON l id=c id WHERE c resolution IN ('Left','Right','Up') AND l source='blink' group by l id having count(*)>1;
  • SQL Joins (Inner, Left, Right and Full Join) - GeeksforGeeks
    INNER JOIN: Returns only the rows where there is a match in both tables LEFT JOIN (LEFT OUTER JOIN): Returns all rows from the left table, and the matched rows from the right table If there's no match, NULL values are returned for columns from the right table
  • SQL LEFT JOIN Keyword - W3Schools
    The LEFT JOIN keyword returns all records from the left table (table1), and the matching records from the right table (table2) The result is 0 records from the right side, if there is no match Note: In some databases LEFT JOIN is called LEFT OUTER JOIN In this tutorial we will use the well-known Northwind sample database
  • SQL Left Joins Overview - Online Tutorials Library
    Left Join or Left Outer Join in SQL combines two or more tables, where the first table is returned wholly; but, only the matching record(s) are retrieved from the consequent tables If zero (0) records are matched in the consequent tables, the join will still return a row in the result, but with NULL in each column from the right table
  • SQL Left Join - w3resource
    The LEFT JOIN keyword ensures that all rows from the left table (the first table listed) are returned, along with the matched rows from the right table If there is no match, the result is NULL for the columns from the right table
  • SQL LEFT JOIN Explained with Practical Examples - GoLinuxCloud
    The SQL LEFT JOIN is a type of join that returns all rows from the left table and only matched rows from the right table It returns zero rows even if it does not find any matched row In case no matched row is found in the right table, NULL is being added in front of all rows of left tables
  • 9 Practical Examples of SQL LEFT JOIN - LearnSQL. com
    LEFT JOIN achieves that goal by returning all the data from the first (left) table and only the matching rows from the second (right) table The non-matched values from the right table will be shown as NULL How is this different from other JOIN s?
  • Left Outer Join - Sigma Computing
    Left Outer Join returns all of the rows in the current data and all the data from the matching rows in the joined data, adding rows when there is more than one match This can result in an expanded row count In the example below, we are using Left Join to join a customer information table with an order information table





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