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日期:2025-04-24
Oracle® Database SQL Reference ... The LIKE conditions specify a test involving
pattern matching. Whereas ... You can use the UPPER function to perform a case
-insensitive match, as in this condition:...
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日期:2025-04-23
Database SQL Reference ... The LIKE conditions specify a test involving pattern
matching. Whereas .... match_parameter is a text literal that lets you change the
default matching behavior of the function....
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日期:2025-04-28
The above query returns the name and salary of all the employees whose have ‘J’ and ‘N’ characters in their last name. It can be KING, KHAN, KITE or KROOV etc. LIKE operator can also be used with numeric data. In such cases, it type casts the numeric into...
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日期:2025-04-27
We're using Oracle 11g database. As you may or may not know, if you use wildcard query with "%" in front of the string, the column index is not being used and a full table scan is happening. It looks like there isn't a definitive suggestion on how to impr...
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日期:2025-04-27
Example - Using Escape Characters It is important to understand how to "Escape Characters" when pattern matching. These examples deal specifically with escaping characters in Oracle. Let's say you wanted to search for a % or a _ character in the SQL LIKE ...
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日期:2025-04-27
The Oracle PL/SQL LIKE operator is used to match or test a conditional term using a "wildcard search". Wildcard characters (operators ... Term: LIKE Definition: The Oracle PL/SQL LIKE operator is used to match or test a conditional term using a "wildcard ...
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日期:2025-04-28
Indexing when using the SQL "like" clause can be tricky because the wildcard "%" operator can invalidate the index. For example a last_name index would be OK with a "like 'SMI%'" query, but unusable with "like '%SMI%'. Solutions to this issue of a leading...
Oracle PL/SQL: LIKE Condition - The LIKE condition allows you to use wildcards in the where clause o
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日期:2025-04-29
The patterns that you can choose FROM are: % allows you TO match ANY string OF ANY LENGTH (including zero LENGTH) _ allows you TO match ON a single character Examples using % wildcard The FIRST example that we 'll take a look at involves ......