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MySQL 5.7 Reference Manual  /  ...  /  ndb_select_count — Print Row Counts for NDB Tables

20.4.23 ndb_select_count — Print Row Counts for NDB Tables

ndb_select_count prints the number of rows in one or more NDB tables. With a single table, the result is equivalent to that obtained by using the MySQL statement SELECT COUNT(*) FROM tbl_name.

Usage

ndb_select_count [-c connection_string] -ddb_name tbl_name[, tbl_name2[, ...]]

The following table includes options that are specific to the NDB Cluster native backup restoration program ndb_select_count. Additional descriptions follow the table. For options common to most NDB Cluster programs (including ndb_select_count), see Section 20.4.28, “Options Common to NDB Cluster Programs — Options Common to NDB Cluster Programs”.

Table 20.100 This table describes command-line options for the ndb_select_count program

Format Description Added or Removed

--database=dbname,

-d

Name of the database in which the table is found

All MySQL 5.7 based releases

--parallelism=#,

-p

Degree of parallelism

All MySQL 5.7 based releases

--lock=#,

-l

Lock type

All MySQL 5.7 based releases


You can obtain row counts from multiple tables in the same database by listing the table names separated by spaces when invoking this command, as shown under Sample Output.

Sample Output

shell> ./ndb_select_count -c localhost -d ctest1 fish dogs
6 records in table fish
4 records in table dogs

NDBT_ProgramExit: 0 - OK

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