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Update docs for LAST_INSERT_ID() #19831

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Update docs for LAST_INSERT_ID() #19831

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2 changes: 2 additions & 0 deletions functions-and-operators/information-functions.md
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Expand Up @@ -219,6 +219,8 @@ TABLE t1;
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> - In the preceding example, IDs increase by 2 while MySQL would generate IDs incrementing by 1 in the same scenario. For more compatibility information, see [Auto-increment ID](/mysql-compatibility.md#auto-increment-id).

The `LAST_INSERT_ID(expr)` function can be used with an expression as argument, in which case the value is remembered for the next call to `LAST_INSERT_ID()` allowing this to be used as a MySQL compatible way of generating sequences. Note that TiDB also has support for proper [sequences](/functions-and-operators/sequence-functions.md).

### ROW_COUNT()

The `ROW_COUNT()` function returns the number of affected rows.
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