How to create indexes in the main table

To create an index in Navicat: Right-click the table, select Index, and specify a type (such as a unique index or primary key index). Select the columns included in the index and specify the sort order. Configure index options (such as index name and usage length). Check the settings and click OK to create the index.

How to create an index within the main table in Navicat

Step 1: Select the table and index type

1. In Navicat, right-click the main table that needs to be indexed and select Index.

2. In the New Index window, select the index type. Common types include:

   • Unique Index: Make sure that the specific column values ​​for each record in the table are unique.
   • Primary key index: A special index uniquely identifies each record in the table.
   • Normal index: Improves the performance of queries on specific columns, but does not force uniqueness.

Step 2: Select the index column

1. In the Index Columns section, select the column you want to include in the index.
2. Multiple columns can be selected to create a joint index.
3. Specifies the sort order (ascending or descending) of the index columns.

Step 3: Configure index options

1. (Optional) In the Index Options section, you can configure the following settings:

   • Index Name: Specifies the custom name of the index.
   • Usage Length: Specifies the maximum length of each column used in the index.
2. (Optional) In the Advanced Options section, you can configure more advanced settings such as index types (B-Tree, Hash, etc.).

Step 4: Create an index

1. Check index settings to ensure compliance.
2. Click the OK button to create an index.

Notice:

• Creating indexes can improve query performance, but also increase overhead when updating tables.
• Before creating an index, it is important to consider the usage patterns and query requirements of the table.
• Indexes only affect specific columns, so choosing the right column is crucial.

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