- 1. Basics
- How to Compare Arrays in PostgreSQL
- How to Concatenate Strings in PostgreSQL
- How to Convert the Case of a String
- How to Create an Array
- How to Insert Array Data Into a Table
- How to Insert Data Into an Array
- How to Modify Arrays
- How to Query Arrays
- How to Replace Substrings
- How to Trim Strings
- How to Use string_agg()
- How to Use substring()
- How to Use substring() with Regular Expressions
- How to Insert
- How to Update
- How to Delete
- 2. Database Management
- How to Create a Table
- How to Drop a Table
- How to Rename a Table
- How to Truncate a Table
- How to Duplicate a Table
- How to Add a Column
- How to Drop a Column
- How to Rename a Column
- How to Add a Default Value to a Column
- How to Remove a Default Value From a Column
- How to Add a Not Null Constraint
- How to Remove a Not Null Constraint
- How to Create an Index
- How to Drop an Index
- How to Create a View
- How to Drop a View
- How to Alter Sequence
- 3. Dates And Time
- How to Exclude Current or Partial Weeks
- How to Use BETWEEN Correctly
- How to Query Date and Time
- How to Group by Time
- How to Round Timestamps
- How to Convert Local Time to UTC
- 4. Analysis
- How to Use Lateral Joins
- How to Use nullif()
- How to Get the First Row per Group
- How to Use generate_series to Avoid Gaps In Data
- How to Do Type Casting
- How to Write a Common Table Expression
- How to Import a CSV
- How to Compare Two Values When One Is Null
- How to Use Coalesce
- How to Write a Case Statement
- How to Query a JSON Column
- How to Use Filter Clause to Have Multiple Counts
- How to Calculate Cumulative Sum-Running Total
- 1. Basics
- How to Concatenate Strings in MS-SQL Server
- How to Convert the Case of a String
- How to replace a Substring in a String
- How to Trim Strings
- How to Use string_agg()
- How to Use substring()
- How to Insert
- How to Update
- How to Delete
- 2. Database Management
- How to Create a Table in MS-SQL
- How to Drop a Table in MS-SQL
- How to Rename a Table in MS-SQL
- How to Truncate a Table in MS-SQL
- How to Duplicate a Table in MS-SQL
- How to Add a Column in MS-SQL
- How to Drop a Column in MS-SQL
- How to Rename a Column in MS-SQL
- How to Add a Default Value to a Column in MS-SQL
- How to Remove a Default Value From a Column in MS-SQL
- How to Add a Not Null Constraint in MS-SQL
- How to Remove a Not Null Constraint in MS-SQL
- How to Create an Index in MS-SQL
- How to Drop an Index in MS-SQL
- How to Create a View in MS-SQL
- How to Drop a View in MS-SQL
- How to Alter Sequence in MS-SQL
- 3. Dates And Time
- How to Exclude Current or Partial Weeks
- How to Use BETWEEN Correctly
- How to Query Date and Time in MS-SQL
- How to Group by Time
- How to Extract a Component From a Datetime
- 4. Analysis
- How to Use Lateral Joins
- How to Use nullif()
- How to Get the First Row per Group
- How to Do Type Casting in MS-SQL
- How to Write a Common Table Expression
- How to Import a CSV
- How to Use Coalesce
- How to Write a Case Statement
- How to Query a JSON Column
- How to Calculate Cumulative Sum-Running Total
- 1. Basics
- How to Concatenate Strings in MySQL
- How to Convert the Case of a String
- How to replace a Substring in a String
- How to Trim a String
- How to use group_concat()
- How to do you Use a substring()
- How to Use substring() with Regular Expressions
- How to use insert into statement
- How to use Update statement in SQL
- How to use Delete SQL Statement
- 2. Database Management
- How to Create a Table in MySQL
- How to Drop a Table in MySQL
- How to Rename a Table in MySQL
- How to Truncate a Table in MySQL
- How to Duplicate a Table in MySQL
- How to Add a Column in MySQL
- How to Drop a Column in MySQL
- How to Rename a Column in MySQL
- How to Add a Default Value to a Column in MySQL
- How to Remove a Default Value From a Column in MySQL
- How to Add a Not Null Constraint in MySQL
- How to Remove a Not Null Constraint in MySQL
- How to Create an Index in MySQL
- How to Drop an Index in MySQL
- How to Create a View in MySQL
- How to Drop a View in MySQL
- How to Alter Sequence in MySQL
- 3. Dates And Time
- How to Exclude Current or Partial Weeks
- How to Use BETWEEN Correctly
- How to Query Date and Time in MySQL
- How to Group by Time
- How to Round Timestamps
- 4. Analysis
- How to Use nullif()
- How to Get the First Row per Group
- How to Do Type Casting in MySQL
- How to Write a Common Table Expression
- How to Import a CSV
- How to Use Coalesce
- How to Write a Case Statement
- How to Query a JSON Column
- How to Calculate Cumulative Sum-Running Total
- 1. Basics
- How to Concatenate Strings in Oracle
- How to Convert the Case of a String
- How to Replace Substrings
- How to Trim Strings
- How to Use listagg()
- How to Use substring()
- How to Use substring() with Regular Expressions
- How to Insert
- How to Update
- How to Delete
- 2. Database Management
- How to Create a Table
- How to Drop a Table
- How to Rename a Table
- How to Truncate a Table
- How to Duplicate a Table
- How to Add a Column
- How to Drop a Column
- How to Rename a Column
- How to Add a Default Value to a Column
- How to Remove a Default Value From a Column
- How to Add a Not Null Constraint
- How to Remove a Not Null Constraint
- How to Create an Index
- How to Drop an Index
- How to Create a View
- How to Drop a View
- How to Alter Sequence
- 3. Dates And Time
- How to Exclude Current or Partial Weeks
- How to Use BETWEEN Correctly
- How to Query Date and Time
- How to Group by Time
- How to Round Timestamps
- 4. Analysis
- How to Use nullif()
- How to Get the First Row per Group
- How to Do Type Casting
- How to Write a Common Table Expression
- How to Import a CSV
- How to Use Coalesce
- How to Write a Case Statement
- How to Query a JSON Column
- How to Use Filter Clause to Have Multiple Counts
- How to Calculate Cumulative Sum-Running Total
- 1. Basics
- How to Concatenate Strings in BigQuery
- How to Convert the Case of a String
- How to replace a Substring in a String
- How to Trim a String
- How to Use string_agg()
- How to use substring() function
- How to Use substring() with Regular Expressions
- How to Use BETWEEN Correctly
- How to use insert into statement
- How to use Update statement in SQL
- How to use Delete SQL Statement
- 2. Database Management
- How to Create a Database in BigQuery
- How to Create a Table in BigQuery
- How to Drop a Table in BigQuery
- How to Rename a Table in BigQuery
- How to Truncate Table in BigQuery
- How to Duplicate a Table in BigQuery
- How to Add a Column in BigQuery
- How to Drop a Column in BigQuery
- How to Add a Default Value to a Column in BigQuery
- How to Add a Not Null Constraint in BigQuery
- How to Remove a Not Null Constraint in BigQuery
- How to Create a View in BigQuery
- How to Drop a View in BigQuery
- 3. Dates And Time
- How to Exclude Current or Partial Weeks
- How to Query Date and Time
- How to Group by Time
- How to Round Timestamps
- 4. Analysis
- How to Use nullif()
- How to Get the First Row per Group
- How to Do Type Casting
- How to Write a Common Table Expression
- How to Compare Two Values When One Is Null
- How to Use Coalesce
- How to Write a Case Statement
- How to Calculate Cumulative Sum-Running Total
How to Use substring()
- 1. Basics
- How to Compare Arrays in PostgreSQL
- How to Concatenate Strings in PostgreSQL
- How to Convert the Case of a String
- How to Create an Array
- How to Insert Array Data Into a Table
- How to Insert Data Into an Array
- How to Modify Arrays
- How to Query Arrays
- How to Replace Substrings
- How to Trim Strings
- How to Use string_agg()
- How to Use substring()
- How to Use substring() with Regular Expressions
- How to Insert
- How to Update
- How to Delete
- 2. Database Management
- How to Create a Table
- How to Drop a Table
- How to Rename a Table
- How to Truncate a Table
- How to Duplicate a Table
- How to Add a Column
- How to Drop a Column
- How to Rename a Column
- How to Add a Default Value to a Column
- How to Remove a Default Value From a Column
- How to Add a Not Null Constraint
- How to Remove a Not Null Constraint
- How to Create an Index
- How to Drop an Index
- How to Create a View
- How to Drop a View
- How to Alter Sequence
- 3. Dates And Time
- How to Exclude Current or Partial Weeks
- How to Use BETWEEN Correctly
- How to Query Date and Time
- How to Group by Time
- How to Round Timestamps
- How to Convert Local Time to UTC
- 4. Analysis
- How to Use Lateral Joins
- How to Use nullif()
- How to Get the First Row per Group
- How to Use generate_series to Avoid Gaps In Data
- How to Do Type Casting
- How to Write a Common Table Expression
- How to Import a CSV
- How to Compare Two Values When One Is Null
- How to Use Coalesce
- How to Write a Case Statement
- How to Query a JSON Column
- How to Use Filter Clause to Have Multiple Counts
- How to Calculate Cumulative Sum-Running Total
- 1. Basics
- How to Concatenate Strings in MS-SQL Server
- How to Convert the Case of a String
- How to replace a Substring in a String
- How to Trim Strings
- How to Use string_agg()
- How to Use substring()
- How to Insert
- How to Update
- How to Delete
- 2. Database Management
- How to Create a Table in MS-SQL
- How to Drop a Table in MS-SQL
- How to Rename a Table in MS-SQL
- How to Truncate a Table in MS-SQL
- How to Duplicate a Table in MS-SQL
- How to Add a Column in MS-SQL
- How to Drop a Column in MS-SQL
- How to Rename a Column in MS-SQL
- How to Add a Default Value to a Column in MS-SQL
- How to Remove a Default Value From a Column in MS-SQL
- How to Add a Not Null Constraint in MS-SQL
- How to Remove a Not Null Constraint in MS-SQL
- How to Create an Index in MS-SQL
- How to Drop an Index in MS-SQL
- How to Create a View in MS-SQL
- How to Drop a View in MS-SQL
- How to Alter Sequence in MS-SQL
- 3. Dates And Time
- How to Exclude Current or Partial Weeks
- How to Use BETWEEN Correctly
- How to Query Date and Time in MS-SQL
- How to Group by Time
- How to Extract a Component From a Datetime
- 4. Analysis
- How to Use Lateral Joins
- How to Use nullif()
- How to Get the First Row per Group
- How to Do Type Casting in MS-SQL
- How to Write a Common Table Expression
- How to Import a CSV
- How to Use Coalesce
- How to Write a Case Statement
- How to Query a JSON Column
- How to Calculate Cumulative Sum-Running Total
- 1. Basics
- How to Concatenate Strings in MySQL
- How to Convert the Case of a String
- How to replace a Substring in a String
- How to Trim a String
- How to use group_concat()
- How to do you Use a substring()
- How to Use substring() with Regular Expressions
- How to use insert into statement
- How to use Update statement in SQL
- How to use Delete SQL Statement
- 2. Database Management
- How to Create a Table in MySQL
- How to Drop a Table in MySQL
- How to Rename a Table in MySQL
- How to Truncate a Table in MySQL
- How to Duplicate a Table in MySQL
- How to Add a Column in MySQL
- How to Drop a Column in MySQL
- How to Rename a Column in MySQL
- How to Add a Default Value to a Column in MySQL
- How to Remove a Default Value From a Column in MySQL
- How to Add a Not Null Constraint in MySQL
- How to Remove a Not Null Constraint in MySQL
- How to Create an Index in MySQL
- How to Drop an Index in MySQL
- How to Create a View in MySQL
- How to Drop a View in MySQL
- How to Alter Sequence in MySQL
- 3. Dates And Time
- How to Exclude Current or Partial Weeks
- How to Use BETWEEN Correctly
- How to Query Date and Time in MySQL
- How to Group by Time
- How to Round Timestamps
- 4. Analysis
- How to Use nullif()
- How to Get the First Row per Group
- How to Do Type Casting in MySQL
- How to Write a Common Table Expression
- How to Import a CSV
- How to Use Coalesce
- How to Write a Case Statement
- How to Query a JSON Column
- How to Calculate Cumulative Sum-Running Total
- 1. Basics
- How to Concatenate Strings in Oracle
- How to Convert the Case of a String
- How to Replace Substrings
- How to Trim Strings
- How to Use listagg()
- How to Use substring()
- How to Use substring() with Regular Expressions
- How to Insert
- How to Update
- How to Delete
- 2. Database Management
- How to Create a Table
- How to Drop a Table
- How to Rename a Table
- How to Truncate a Table
- How to Duplicate a Table
- How to Add a Column
- How to Drop a Column
- How to Rename a Column
- How to Add a Default Value to a Column
- How to Remove a Default Value From a Column
- How to Add a Not Null Constraint
- How to Remove a Not Null Constraint
- How to Create an Index
- How to Drop an Index
- How to Create a View
- How to Drop a View
- How to Alter Sequence
- 3. Dates And Time
- How to Exclude Current or Partial Weeks
- How to Use BETWEEN Correctly
- How to Query Date and Time
- How to Group by Time
- How to Round Timestamps
- 4. Analysis
- How to Use nullif()
- How to Get the First Row per Group
- How to Do Type Casting
- How to Write a Common Table Expression
- How to Import a CSV
- How to Use Coalesce
- How to Write a Case Statement
- How to Query a JSON Column
- How to Use Filter Clause to Have Multiple Counts
- How to Calculate Cumulative Sum-Running Total
- 1. Basics
- How to Concatenate Strings in BigQuery
- How to Convert the Case of a String
- How to replace a Substring in a String
- How to Trim a String
- How to Use string_agg()
- How to use substring() function
- How to Use substring() with Regular Expressions
- How to Use BETWEEN Correctly
- How to use insert into statement
- How to use Update statement in SQL
- How to use Delete SQL Statement
- 2. Database Management
- How to Create a Database in BigQuery
- How to Create a Table in BigQuery
- How to Drop a Table in BigQuery
- How to Rename a Table in BigQuery
- How to Truncate Table in BigQuery
- How to Duplicate a Table in BigQuery
- How to Add a Column in BigQuery
- How to Drop a Column in BigQuery
- How to Add a Default Value to a Column in BigQuery
- How to Add a Not Null Constraint in BigQuery
- How to Remove a Not Null Constraint in BigQuery
- How to Create a View in BigQuery
- How to Drop a View in BigQuery
- 3. Dates And Time
- How to Exclude Current or Partial Weeks
- How to Query Date and Time
- How to Group by Time
- How to Round Timestamps
- 4. Analysis
- How to Use nullif()
- How to Get the First Row per Group
- How to Do Type Casting
- How to Write a Common Table Expression
- How to Compare Two Values When One Is Null
- How to Use Coalesce
- How to Write a Case Statement
- How to Calculate Cumulative Sum-Running Total
This classic string function has two syntax in Oracle, you can use any of them.
select substr('hello how are you', 7,3) as substring from dual;
substring |
---|
"how" |
The second parameter specifies the position where the substring starts and the third parameter is the length of the substring to extract. If the length parameter is omitted, the substring to extract is until the end of the source string.
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Build visual data models without learning a new language
Create two dashboards and ten reports for free