This is a guide to PostgreSQL String Contains. From this article, we learn how we can handle different LIKE operators. From the above article, we learn the basic syntax of LIKE operator statements then we also learn how we can implement LIKE operators using different methods with multiple examples. We hope from this above article you have understood about the PostgreSQL String Contain statement.
% it is used to retrieve one or more characters from the database.% (wildcard) is used to get all characters.Like operator is used to find or retrieve data to specified matching patterns.PostgreSQL also provides some other operators that are similar with like, ilike, not like and not ilike as shown in the table below. In the output, it will display nothing as mentioned above.
Illustrate the end result of the above declaration by using the use of the following snapshot. Let’s see what happens when we use only like operator in the same statement. But if you use only like operators, it does not return any row. The BOB% pattern matches any string beginning with BOB, Bob, and bob. See the following statement to implement the ILIKE operator. Suppose we need to find out bob employee name and we do not know bob character is a capital letter or a small letter. This ilike operator is used in PostgreSQL in case-insensitively conditions. Illustrate the end result of the above declaration by using the following snapshot. Use the following statement to implement not like operator. Suppose we need to find out all employee names whose names do not start with po. This operator is totally opposite from like. So you can use % sign to find out Alex employee but you can also use % and _ sign to find out ales user. We can combine percentage and underscore signs to get the desired patternĬonsidering the above example we need to find Alex’s employee name and we know the last three characters like lex. Let’s see the example, consider the following statement. By using the following syntax we return ex character. Illustrate the end result of the above declaration by using the use of the following snapshot.Ĭonsider another example, suppose we need to find those employee names that end with an ex. We use the following statement to find out employee names like bo.Įxplanation: With the help of the above statement, we find those names start with ‘bo’ characters where we use select and where clause to implement the above statement and we return two-column emp_id and emp_name. _(Underscore sign): This sign is used to match any single character.Ĭonsider the above example we need to find out the employee’s name and you do not remember the exact name of the employee, but you remember the first two characters for example bo.%(Percentage sign): This sign is used to match any sequence of character, the character size may be zero or more.So you can use the like an operator that is provided by PostgreSQL. So how can we find the exact name of an employee? You may find names in emp_info tables but it is a time-consuming process. But you remember the first two characters like bo. Suppose we need to find out the employee’s name and you do not remember her exact name. Now see how we can use like operator to find out the matching pattern using the below methods. So first we create a table by using the following statement.įor selecting the table emp_info we will use the following:
Basically in a matching pattern function, we use the like operator to find out the desired matching pattern from the database table. Pattern matching we can implement by using different methods as follows.
POSTGRES ILIKE INSTALL
We must install PostgreSql in your system.PostgreSQL String Contains Function Works with Examples Specified column name like ‘matching pattern’ Įxplanation: In the above syntax we implement a pattern like matching function by using select and where clause where column name is specified column name in the table, table name means specified table name. Hadoop, Data Science, Statistics & others
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